NP-MRD: Showing NP-Card for 8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol (NP0233365)

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Record Information

Version

2.0

Created at

2022-09-06 14:56:23 UTC

Updated at

2022-09-06 14:56:23 UTC

NP-MRD ID

NP0233365

Secondary Accession Numbers

None

Natural Product Identification

Common Name

8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol

Description

8,16-Dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]Heptadeca-2(7),3,5,10(15),11,13-hexaene-4,5,13,17-tetrol belongs to the class of organic compounds known as leucoanthocyanidins. These are flavonoids consisting of a flavan (3,4-dihydro-2-phenyl-2H-1-benzopyran) moiety that carries two hydroxy groups at the C3- and C4-positions. 8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol is found in Peltophorum africanum. 8,16-Dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]Heptadeca-2(7),3,5,10(15),11,13-hexaene-4,5,13,17-tetrol is a very hydrophobic molecule, practically insoluble (in water), and relatively neutral.

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 33 36  0  0  0  0  0  0  0  0999 V2000
   -4.7268    2.0260   -0.5502 O   0  0  0  0  0  0  0  0  0  0  0  0
   -3.6993    1.0691   -0.4380 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.6754    0.0011   -1.3095 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.6933   -0.9646   -1.2450 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7029   -0.8557   -0.2749 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7214    0.2137    0.6025 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7231    1.1885    0.5282 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7575    0.3804    1.5975 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.2988   -0.5689    1.6163 C   0  0  2  0  0  0  0  0  0  0  0  0
    1.3163   -0.0784    0.6408 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.2255    0.9156    1.0076 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.1551    1.3537    0.0933 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.0561    2.3443    0.4693 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.2397    0.8559   -1.1896 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.1995    1.3244   -2.0977 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.3346   -0.1240   -1.5335 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.3730   -0.5967   -0.6310 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.4722   -1.5861   -1.0048 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6497   -1.8856   -0.2009 C   0  0  1  0  0  0  0  0  0  0  0  0
   -0.1620   -1.9450    1.2523 C   0  0  1  0  0  0  0  0  0  0  0  0
    0.9320   -2.7978    1.3268 O   0  0  0  0  0  0  0  0  0  0  0  0
   -4.5540    2.8310   -1.1686 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.4772   -0.0436   -2.0586 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.6936   -1.8052   -1.9478 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7604    2.0284    1.1972 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.7143   -0.6002    2.6440 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.1618    1.3081    2.0131 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.0403    2.7426    1.3900 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.8411    2.0406   -1.8058 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.3679   -0.5341   -2.5161 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0652   -2.8798   -0.4209 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9587   -2.2964    1.9037 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.2925   -3.0612    0.4510 H   0  0  0  0  0  0  0  0  0  0  0  0
 21 20  1  0
 20 19  1  0
 19 18  1  0
 18 17  1  0
 17 16  2  0
 16 14  1  0
 14 15  1  0
 14 12  2  0
 12 13  1  0
 12 11  1  0
 11 10  2  0
 10  9  1  0
  9  8  1  0
  8  6  1  0
  6  7  2  0
  7  2  1  0
  2  1  1  0
  2  3  2  0
  3  4  1  0
  4  5  2  0
  9 20  1  0
  5  6  1  0
  5 19  1  0
 10 17  1  0
 21 33  1  0
 20 32  1  1
 19 31  1  6
 16 30  1  0
 15 29  1  0
 13 28  1  0
 11 27  1  0
  9 26  1  1
  7 25  1  0
  1 22  1  0
  3 23  1  0
  4 24  1  0
M  END


  Mrv1533004171511132D          

 21 24  0  0  0  0            999 V2000
    2.5480    1.7114    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.7458    1.5188    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.0843    0.6260    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9093    0.6260    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.4927    1.2094    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.2071    0.7969    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.9216    1.2094    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.6361    0.7969    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.9216    2.0344    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.6361    2.4469    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.2071    2.4469    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.4927    2.0344    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9093    2.6178    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.0843    2.6178    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.5009    2.0344    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2135    2.4469    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9280    2.0344    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6425    2.4469    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9280    1.2094    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2135    0.7969    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.5009    1.2094    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  5  6  2  0  0  0  0
  6  7  1  0  0  0  0
  7  8  1  0  0  0  0
  7  9  2  0  0  0  0
  9 10  1  0  0  0  0
  9 11  1  0  0  0  0
 11 12  2  0  0  0  0
  5 12  1  0  0  0  0
 12 13  1  0  0  0  0
  2 13  1  0  0  0  0
 13 14  1  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  1  0  0  0  0
 17 19  2  0  0  0  0
 19 20  1  0  0  0  0
 20 21  2  0  0  0  0
  3 21  1  0  0  0  0
 15 21  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0233365

> <DATABASE_NAME>
NP-MRD

> <SMILES>
OC1C2OC3=CC(O)=C(O)C=C3C1OC1=CC(O)=CC=C21

> <INCHI_IDENTIFIER>
InChI=1S/C15H12O6/c16-6-1-2-7-11(3-6)20-15-8-4-9(17)10(18)5-12(8)21-14(7)13(15)19/h1-5,13-19H

> <INCHI_KEY>
NREPOMIEDIKIAZ-UHFFFAOYSA-N

> <FORMULA>
C15H12O6

> <MOLECULAR_WEIGHT>
288.255

> <EXACT_MASS>
288.063388106

> <JCHEM_ACCEPTOR_COUNT>
6

> <JCHEM_ATOM_COUNT>
33

> <JCHEM_AVERAGE_POLARIZABILITY>
27.505646494091025

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
4

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol

> <ALOGPS_LOGP>
1.20

> <JCHEM_LOGP>
1.540581993

> <ALOGPS_LOGS>
-2.25

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
4

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA>
9.657562783104023

> <JCHEM_PKA_STRONGEST_ACIDIC>
9.050225317529105

> <JCHEM_PKA_STRONGEST_BASIC>
-3.720593058559392

> <JCHEM_POLAR_SURFACE_AREA>
99.38000000000001

> <JCHEM_REFRACTIVITY>
71.42819999999999

> <JCHEM_ROTATABLE_BOND_COUNT>
0

> <JCHEM_RULE_OF_FIVE>
1

> <ALOGPS_SOLUBILITY>
1.60e+00 g/l

> <JCHEM_TRADITIONAL_IUPAC>
8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 17-APR-15   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   17-APR-15         0                                  
HETATM    1  O   UNK     0       4.756   3.195   0.000  0.00  0.00           O+0
HETATM    2  C   UNK     0       3.259   2.835   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       2.024   1.169   0.000  0.00  0.00           C+0
HETATM    4  O   UNK     0       3.564   1.169   0.000  0.00  0.00           O+0
HETATM    5  C   UNK     0       4.653   2.258   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       5.987   1.488   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       7.320   2.258   0.000  0.00  0.00           C+0
HETATM    8  O   UNK     0       8.654   1.488   0.000  0.00  0.00           O+0
HETATM    9  C   UNK     0       7.320   3.798   0.000  0.00  0.00           C+0
HETATM   10  O   UNK     0       8.654   4.568   0.000  0.00  0.00           O+0
HETATM   11  C   UNK     0       5.987   4.568   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0       4.653   3.798   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0       3.564   4.886   0.000  0.00  0.00           C+0
HETATM   14  O   UNK     0       2.024   4.886   0.000  0.00  0.00           O+0
HETATM   15  C   UNK     0       0.935   3.798   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0      -0.399   4.568   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0      -1.732   3.798   0.000  0.00  0.00           C+0
HETATM   18  O   UNK     0      -3.066   4.568   0.000  0.00  0.00           O+0
HETATM   19  C   UNK     0      -1.732   2.258   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0      -0.399   1.488   0.000  0.00  0.00           C+0
HETATM   21  C   UNK     0       0.935   2.258   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3   13                                                  
CONECT    3    2    4   21                                                  
CONECT    4    3    5                                                       
CONECT    5    4    6   12                                                  
CONECT    6    5    7                                                       
CONECT    7    6    8    9                                                  
CONECT    8    7                                                            
CONECT    9    7   10   11                                                  
CONECT   10    9                                                            
CONECT   11    9   12                                                       
CONECT   12   11    5   13                                                  
CONECT   13   12    2   14                                                  
CONECT   14   13   15                                                       
CONECT   15   14   16   21                                                  
CONECT   16   15   17                                                       
CONECT   17   16   18   19                                                  
CONECT   18   17                                                            
CONECT   19   17   20                                                       
CONECT   20   19   21                                                       
CONECT   21   20    3   15                                                  
MASTER        0    0    0    0    0    0    0    0   21    0   48    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₁₅H₁₂O₆

Average Mass

288.2550 Da

Monoisotopic Mass

288.06339 Da

IUPAC Name

8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol

Traditional Name

8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol

CAS Registry Number

Not Available

SMILES

OC1C2OC3=CC(O)=C(O)C=C3C1OC1=CC(O)=CC=C21

InChI Identifier

InChI=1S/C15H12O6/c16-6-1-2-7-11(3-6)20-15-8-4-9(17)10(18)5-12(8)21-14(7)13(15)19/h1-5,13-19H

InChI Key

NREPOMIEDIKIAZ-UHFFFAOYSA-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
Peltophorum africanum	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as leucoanthocyanidins. These are flavonoids consisting of a flavan (3,4-dihydro-2-phenyl-2H-1-benzopyran) moiety that carries two hydroxy groups at the C3- and C4-positions.

Kingdom

Organic compounds

Super Class

Phenylpropanoids and polyketides

Class

Flavonoids

Sub Class

Flavans

Direct Parent

Leucoanthocyanidins

Alternative Parents

Substituents

Leucoanthocyanidin-skeleton
Chromane
Benzopyran
1-benzopyran
1-hydroxy-2-unsubstituted benzenoid
Alkyl aryl ether
Phenol
Benzenoid
Secondary alcohol
Oxacycle
Ether
Organoheterocyclic compound
Polyol
Alcohol
Organic oxygen compound
Organooxygen compound
Hydrocarbon derivative
Aromatic heteropolycyclic compound

Molecular Framework

Aromatic heteropolycyclic compounds

External Descriptors

Flavans, Flavanols and Leucoanthocyanidins (LMPK12020156 )

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	1.2	ALOGPS
logP	1.54	ChemAxon
logS	-2.2	ALOGPS
pKa (Strongest Acidic)	9.05	ChemAxon
pKa (Strongest Basic)	-3.7	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	6	ChemAxon
Hydrogen Donor Count	4	ChemAxon
Polar Surface Area	99.38 Å²	ChemAxon
Rotatable Bond Count	0	ChemAxon
Refractivity	71.43 m³·mol⁻¹	ChemAxon
Polarizability	27.51 Å³	ChemAxon
Number of Rings	4	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

74977192

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for 8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol (NP0233365)

MOL for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)

3D MOL for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)

3D SDF for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)

3D-SDF for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)

PDB for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)

3D PDB for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)

SMILES for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)

INCHI for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)

Structure for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)

3D Structure for NP0233365 (8,16-dioxatetracyclo[7.7.1.0²,⁷.0¹⁰,¹⁵]heptadeca-2,4,6,10,12,14-hexaene-4,5,13,17-tetrol)