| Nupharpumilamine B | Organic compounds | Organoheterocyclic compounds | Quinolizines | Not Available | Details |
| O,O-Dimethylcorytuberine | Organic compounds | Alkaloids and derivatives | Aporphines | Not Available | Details |
| O-Methylalfileramine | Organic compounds | Organoheterocyclic compounds | Benzopyrans | 1-benzopyrans | Details |
| O-Methyloduline | Organic compounds | Alkaloids and derivatives | Amaryllidaceae alkaloids | Homolycorine-type amaryllidaceae alkaloids | Details |
| Oripavine | Organic compounds | Alkaloids and derivatives | Morphinans | Not Available | Details |
| Oscillamide Y | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Oxocularicine | Organic compounds | Organoheterocyclic compounds | Benzoxepines | Dibenzoxepines | Details |
| Oxotuberostemonine | Organic compounds | Organoheterocyclic compounds | Indoles and derivatives | Not Available | Details |
| (+)-Oxymaistemonine | Organic compounds | Organoheterocyclic compounds | Azepanes | Not Available | Details |
| (+)-Oxystemofoline | Not Available | Not Available | Not Available | Not Available | Details |
| (+)-Pakistanine | Organic compounds | Alkaloids and derivatives | Aporphines | Not Available | Details |
| Pancritamine | Organic compounds | Alkaloids and derivatives | Amaryllidaceae alkaloids | Galanthamine-type amaryllidaceae alkaloids | Details |
| (+)-Panganensine R | Organic compounds | Alkaloids and derivatives | Strychnos alkaloids | Not Available | Details |
| Parvistemoamide | Organic compounds | Organoheterocyclic compounds | Lactones | Gamma butyrolactones | Details |
| Paspaline B | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Oxosteroids | Details |
| Penazetidine A | Organic compounds | Organoheterocyclic compounds | Azetidines | Not Available | Details |
| Petrosamine | Organic compounds | Organoheterocyclic compounds | Quinolines and derivatives | Benzoquinolines | Details |
| PF1070A | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Phlegmariurine C | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Eicosanoids | Details |
| Phorbazole B | Organic compounds | Organoheterocyclic compounds | Azoles | Oxazoles | Details |
| Phyllurine | Organic compounds | Phenylpropanoids and polyketides | Cinnamic acids and derivatives | Hydroxycinnamic acids and derivatives | Details |
| Pingpeimine A | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Steroidal alkaloids | Details |
| Pingpeimine B | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Steroidal alkaloids | Details |
| (+)-Pinnatoxin A | Not Available | Not Available | Not Available | Not Available | Details |
| Plakinidine D | Organic compounds | Organoheterocyclic compounds | Phenanthrolines | Not Available | Details |
| Potanine | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Diterpenoids | Details |
| Pseudocyclotheonamide B2 | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Pulchine | Organic compounds | Alkaloids and derivatives | Aporphines | Not Available | Details |
| Pumiliotoxin B | Organic compounds | Alkaloids and derivatives | Pumiliotoxins, homopumiliotoxins, and allopumiliotoxins | Not Available | Details |
| 7-{[(2s,3r,4s,5s,6r)-3-{[(2s,3r,4r)-3,4-dihydroxy-4-(hydroxymethyl)oxolan-2-yl]oxy}-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-5-hydroxy-6-methoxy-2-(4-methoxyphenyl)chromen-4-one | Organic compounds | Phenylpropanoids and polyketides | Flavonoids | Flavonoid glycosides | Details |
