NP-MRD: Showing NP-Card for (3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione (NP0195756)

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Record Information

Version

2.0

Created at

2022-09-04 13:40:44 UTC

Updated at

2022-09-04 13:40:44 UTC

NP-MRD ID

NP0195756

Secondary Accession Numbers

None

Natural Product Identification

Common Name

(3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione

Description

(3AR,7aS)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-2,3,3a,6,7,7a-hexahydro-1H-indole-2,6-dione belongs to the class of organic compounds known as cinnamic acids and derivatives. These are organic aromatic compounds containing a benzene and a carboxylic acid group (or a derivative thereof) forming 3-phenylprop-2-enoic acid. (3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione is found in Toussaintia orientalis. Based on a literature review very few articles have been published on (3aR,7aS)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-2,3,3a,6,7,7a-hexahydro-1H-indole-2,6-dione.

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 37 39  0  0  0  0  0  0  0  0999 V2000
   -3.8591   -2.7839    0.4522 O   0  0  0  0  0  0  0  0  0  0  0  0
   -3.5654   -1.5988    0.2049 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.3689   -0.8415   -0.7363 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.2848    0.5106   -0.7890 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.3305    1.0836    0.1740 C   0  0  2  0  0  0  0  0  0  0  0  0
   -3.8784    0.9222    1.4514 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8300    2.4489   -0.0713 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4643    2.3370    0.6043 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9369    3.2526    1.2662 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9813    1.0302    0.3127 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.4114    0.7120    0.3041 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.1995    1.5922    0.6823 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.8392   -0.5758   -0.1312 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9342   -1.2253   -0.2382 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.3179   -0.9516    0.0525 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.8048    0.0384    0.8520 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.1685    0.2951    1.0211 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.0637   -0.4923    0.3488 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.6413   -1.5149   -0.4761 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.3023   -1.7369   -0.6191 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0619    0.2158    0.0018 C   0  0  1  0  0  0  0  0  0  0  0  0
   -2.3771   -0.9650    0.8876 C   0  0  0  0  0  0  0  0  0  0  0  0
   -5.0482   -1.3214   -1.4119 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.8646    1.0775   -1.4708 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.0722    1.8260    1.7829 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.3903    3.1796    0.5457 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7305    2.7219   -1.1196 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0503   -1.2374   -0.5356 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.7894   -2.3173   -0.6556 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.1371    0.6299    1.4271 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.4754    1.1121    1.6812 H   0  0  0  0  0  0  0  0  0  0  0  0
    7.1214   -0.3232    0.4553 H   0  0  0  0  0  0  0  0  0  0  0  0
    6.3637   -2.1371   -1.0065 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.9576   -2.5400   -1.2705 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0438   -0.2002   -1.0404 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8119   -0.5709    1.8571 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5768   -1.6520    1.0980 H   0  0  0  0  0  0  0  0  0  0  0  0
  5  6  1  1
  5  7  1  0
  7  8  1  0
  8  9  2  0
  8 10  1  0
 10 21  1  0
 21 22  1  0
 22  2  1  0
  2  1  2  0
  2  3  1  0
  3  4  2  0
 10 11  1  0
 11 12  2  0
 11 13  1  0
 13 14  2  0
 14 15  1  0
 15 16  2  0
 16 17  1  0
 17 18  2  0
 18 19  1  0
 19 20  2  0
 21  5  1  0
 20 15  1  0
  4  5  1  0
  6 25  1  0
  7 26  1  0
  7 27  1  0
 21 35  1  6
 22 36  1  0
 22 37  1  0
  3 23  1  0
  4 24  1  0
 13 28  1  0
 14 29  1  0
 16 30  1  0
 17 31  1  0
 18 32  1  0
 19 33  1  0
 20 34  1  0
M  END


  Mrv1652309042215402D          

 22 24  0  0  1  0            999 V2000
    4.0668    2.3479    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.3523    1.9354    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.3523    1.1104    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.6378    0.6979    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9233    1.1104    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    1.8371    0.2900    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.1387    0.8555    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.6538    1.5229    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.1712    1.5229    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.1387    2.1904    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.8838    2.9750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0768    3.1465    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.4358    3.5881    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.1809    4.3727    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.7329    4.9858    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4780    5.7704    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.0300    6.3835    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8370    6.2120    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.0919    5.4274    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.5399    4.8143    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9233    1.9354    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    2.6378    2.3479    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  0  0  0  0
  2  3  1  0  0  0  0
  3  4  2  0  0  0  0
  4  5  1  0  0  0  0
  5  6  1  1  0  0  0
  5  7  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  2  0  0  0  0
  8 10  1  0  0  0  0
 10 11  1  0  0  0  0
 11 12  2  0  0  0  0
 13 11  1  4  0  0  0
 13 14  2  0  0  0  0
 14 15  1  0  0  0  0
 15 16  2  0  0  0  0
 16 17  1  0  0  0  0
 17 18  2  0  0  0  0
 18 19  1  0  0  0  0
 19 20  2  0  0  0  0
 15 20  1  0  0  0  0
 21 10  1  1  0  0  0
  5 21  1  0  0  0  0
 21 22  1  0  0  0  0
  2 22  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0195756

> <DATABASE_NAME>
NP-MRD

> <SMILES>
O[C@@]12CC(=O)N([C@H]1CC(=O)C=C2)C(=O)C=CC1=CC=CC=C1

> <INCHI_IDENTIFIER>
InChI=1S/C17H15NO4/c19-13-8-9-17(22)11-16(21)18(14(17)10-13)15(20)7-6-12-4-2-1-3-5-12/h1-9,14,22H,10-11H2/t14-,17-/m0/s1

> <INCHI_KEY>
QCYNQLVLOBLZFY-YOEHRIQHSA-N

> <FORMULA>
C17H15NO4

> <MOLECULAR_WEIGHT>
297.31

> <EXACT_MASS>
297.100107967

> <JCHEM_ACCEPTOR_COUNT>
4

> <JCHEM_ATOM_COUNT>
37

> <JCHEM_AVERAGE_POLARIZABILITY>
30.664416770554794

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
1

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
(3aR,7aS)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-2,3,3a,6,7,7a-hexahydro-1H-indole-2,6-dione

> <JCHEM_LOGP>
1.2583260993333334

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
3

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA>
17.37603984968338

> <JCHEM_PKA_STRONGEST_ACIDIC>
13.482762663279736

> <JCHEM_PKA_STRONGEST_BASIC>
-3.4622540882294235

> <JCHEM_POLAR_SURFACE_AREA>
74.68

> <JCHEM_REFRACTIVITY>
81.177

> <JCHEM_ROTATABLE_BOND_COUNT>
2

> <JCHEM_RULE_OF_FIVE>
1

> <JCHEM_TRADITIONAL_IUPAC>
(3aR,7aS)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3H-indole-2,6-dione

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 04-SEP-22   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   04-SEP-22         0                                  
HETATM    1  O   UNK     0       7.591   4.383   0.000  0.00  0.00           O+0
HETATM    2  C   UNK     0       6.258   3.613   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       6.258   2.073   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0       4.924   1.303   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       3.590   2.073   0.000  0.00  0.00           C+0
HETATM    6  O   UNK     0       3.429   0.541   0.000  0.00  0.00           O+0
HETATM    7  C   UNK     0       2.126   1.597   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0       1.220   2.843   0.000  0.00  0.00           C+0
HETATM    9  O   UNK     0      -0.320   2.843   0.000  0.00  0.00           O+0
HETATM   10  N   UNK     0       2.126   4.089   0.000  0.00  0.00           N+0
HETATM   11  C   UNK     0       1.650   5.553   0.000  0.00  0.00           C+0
HETATM   12  O   UNK     0       0.143   5.874   0.000  0.00  0.00           O+0
HETATM   13  C   UNK     0       2.680   6.698   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       2.204   8.162   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       3.235   9.307   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       2.759  10.771   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0       3.789  11.916   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0       5.296  11.596   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0       5.772  10.131   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0       4.741   8.987   0.000  0.00  0.00           C+0
HETATM   21  C   UNK     0       3.590   3.613   0.000  0.00  0.00           C+0
HETATM   22  C   UNK     0       4.924   4.383   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3   22                                                  
CONECT    3    2    4                                                       
CONECT    4    3    5                                                       
CONECT    5    4    6    7   21                                             
CONECT    6    5                                                            
CONECT    7    5    8                                                       
CONECT    8    7    9   10                                                  
CONECT    9    8                                                            
CONECT   10    8   11   21                                                  
CONECT   11   10   12   13                                                  
CONECT   12   11                                                            
CONECT   13   11   14                                                       
CONECT   14   13   15                                                       
CONECT   15   14   16   20                                                  
CONECT   16   15   17                                                       
CONECT   17   16   18                                                       
CONECT   18   17   19                                                       
CONECT   19   18   20                                                       
CONECT   20   19   15                                                       
CONECT   21   10    5   22                                                  
CONECT   22   21    2                                                       
MASTER        0    0    0    0    0    0    0    0   22    0   48    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₁₇H₁₅NO₄

Average Mass

297.3100 Da

Monoisotopic Mass

297.10011 Da

IUPAC Name

(3aR,7aS)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-2,3,3a,6,7,7a-hexahydro-1H-indole-2,6-dione

Traditional Name

(3aR,7aS)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3H-indole-2,6-dione

CAS Registry Number

Not Available

SMILES

O[C@@]12CC(=O)N([C@H]1CC(=O)C=C2)C(=O)C=CC1=CC=CC=C1

InChI Identifier

InChI=1S/C17H15NO4/c19-13-8-9-17(22)11-16(21)18(14(17)10-13)15(20)7-6-12-4-2-1-3-5-12/h1-9,14,22H,10-11H2/t14-,17-/m0/s1

InChI Key

QCYNQLVLOBLZFY-YOEHRIQHSA-N

Experimental Spectra

Not Available

Predicted Spectra

Spectrum Type	Description	Depositor ID	Depositor Organization	Depositor	Deposition Date	View
1D NMR	¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum

Chemical Shift Submissions

Not Available

Species

Species of Origin

Species Name	Source	Reference
Toussaintia orientalis	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as cinnamic acids and derivatives. These are organic aromatic compounds containing a benzene and a carboxylic acid group (or a derivative thereof) forming 3-phenylprop-2-enoic acid.

Kingdom

Organic compounds

Super Class

Phenylpropanoids and polyketides

Class

Cinnamic acids and derivatives

Sub Class

Not Available

Direct Parent

Cinnamic acids and derivatives

Alternative Parents

Substituents

Cinnamic acid or derivatives
Indole or derivatives
Styrene
N-acylpyrrolidine
Cyclohexenone
Benzenoid
2-pyrrolidone
Pyrrolidone
Carboxylic acid imide, n-substituted
Monocyclic benzene moiety
Tertiary alcohol
Pyrrolidine
Dicarboximide
Carboxylic acid imide
Cyclic ketone
Lactam
Ketone
Azacycle
Organoheterocyclic compound
Carboxylic acid derivative
Organic nitrogen compound
Organic oxygen compound
Organopnictogen compound
Organic oxide
Hydrocarbon derivative
Organooxygen compound
Organonitrogen compound
Carbonyl group
Alcohol
Aromatic heteropolycyclic compound

Molecular Framework

Aromatic heteropolycyclic compounds

External Descriptors

Not Available

Physical Properties

State

Not Available

Experimental Properties

Property	Value	Reference
Melting Point	Not Available	Not Available
Boiling Point	Not Available	Not Available
Water Solubility	Not Available	Not Available
LogP	Not Available	Not Available

Predicted Properties

Property	Value	Source
logP	1.26	ChemAxon
pKa (Strongest Acidic)	13.48	ChemAxon
pKa (Strongest Basic)	-3.5	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	4	ChemAxon
Hydrogen Donor Count	1	ChemAxon
Polar Surface Area	74.68 Å²	ChemAxon
Rotatable Bond Count	2	ChemAxon
Refractivity	81.18 m³·mol⁻¹	ChemAxon
Polarizability	30.66 Å³	ChemAxon
Number of Rings	3	ChemAxon
Bioavailability	Yes	ChemAxon
Rule of Five	Yes	ChemAxon
Ghose Filter	Yes	ChemAxon
Veber's Rule	No	ChemAxon
MDDR-like Rule	No	ChemAxon

External Links

HMDB ID

Not Available

DrugBank ID

Not Available

Phenol Explorer Compound ID

Not Available

FoodDB ID

Not Available

KNApSAcK ID

Not Available

Chemspider ID

Not Available

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

162878571

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for (3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione (NP0195756)

MOL for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)

3D MOL for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)

3D SDF for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)

3D-SDF for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)

PDB for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)

3D PDB for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)

SMILES for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)

INCHI for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)

Structure for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)

3D Structure for NP0195756 ((3ar,7as)-3a-hydroxy-1-(3-phenylprop-2-enoyl)-7,7a-dihydro-3h-indole-2,6-dione)