| Phosphodiesterase 5 Inhibitors | Compounds that specifically inhibit PHOSPHODIESTERASE 5. | 12 | 395 | Details |
| Phosphodiesterase Inhibitors | Compounds which inhibit or antagonize the biosynthesis or actions of phosphodiesterases. | 45 | 191 | Details |
| Phosphogluconate Dehydrogenase, antagonists & inhibitors | Not Available | 2 | 1 | Details |
| Phosphoinositide-3 Kinase Inhibitors | Agents that inhibit PHOSPHOINOSITIDE-3 KINASE activity. | 2 | 0 | Details |
| Phospholipase A2 Inhibitors | Compounds that inhibit or block the activity of a PHOSPHOLIPASE A2 enzyme. | 3 | 3 | Details |
| Phospholipase D, antagonists & inhibitors | Not Available | 1 | 0 | Details |
| Phospholipases A, antagonists & inhibitors | Not Available | 4 | 8 | Details |
| Phospholipid Ethers | Phospholipids which have an alcohol moiety in ethereal linkage with a saturated or unsa... more | 1 | 3 | Details |
| Phospholipids | Lipids containing one or more phosphate groups, particularly those derived from either ... more | 26 | 31 | Details |
| Phosphonic Acid Derivatives | Not Available | 1 | 4 | Details |
| Phosphoprotein Phosphatases | A group of enzymes removing the SERINE- or THREONINE-bound phosphate groups from a wide... more | 1 | 0 | Details |
| Phosphoprotein Phosphatases, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Phosphoproteins | Not Available | 1 | 0 | Details |
| Phosphoramide Mustards | A group of nitrogen mustard compounds which are substituted with a phosphoramide group ... more | 7 | 22 | Details |
| Phosphoramides | Amide derivatives of phosphoric acid such as compounds that include the phosphoric tria... more | 9 | 26 | Details |
| Phosphoric Acids | Inorganic derivatives of phosphoric acid (H3PO4). Note that organic derivatives of phos... more | 26 | 145 | Details |
| Phosphoric Diester Hydrolases | A class of enzymes that catalyze the hydrolysis of one of the two ester bonds in a phos... more | 1 | 0 | Details |
| Phosphoric Monoester Hydrolases | A group of hydrolases which catalyze the hydrolysis of monophosphoric esters with the p... more | 3 | 1 | Details |
| Phosphorous derivatives | Not Available | 0 | 0 | Details |
| Phosphorus Acids | Inorganic acids that contain phosphorus as an integral part of the molecule. | 32 | 150 | Details |
| Phosphorus Compounds | Inorganic compounds that contain phosphorus as an integral part of the molecule. | 33 | 151 | Details |
| Phosphorus Isotopes | Stable phosphorus atoms that have the same atomic number as the element phosphorus, but... more | 1 | 0 | Details |
| Phosphorylase b, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Phosphorylcholine | Not Available | 1 | 3 | Details |
| Phosphotransferases | A rather large group of enzymes comprising not only those transferring phosphate but al... more | 6 | 2 | Details |