| Phenanthridines | Cyclic compounds that include atoms other than carbon in their ring structure. | 3 | 10 | Details |
| Phenazines | Cyclic compounds that include atoms other than carbon in their ring structure. | 1 | 10 | Details |
| Phencyclidine, antagonists & inhibitors | Not Available | 1 | 6 | Details |
| Phenethylamines | A group of compounds that are derivatives of beta- aminoethylbenzene which is structura... more | 67 | 309 | Details |
| Phenobarbital and similars | A barbituric acid derivative that acts as a nonselective central nervous system depress... more | 3 | 60 | Details |
| Phenol and Derivatives | Not Available | 6 | 24 | Details |
| Phenolphthaleins | A family of 3,3-bis(p-hydroxyphenyl)phthalides. They are used as CATHARTICS, indicators... more | 3 | 24 | Details |
| Phenols | Benzene derivatives that include one or more hydroxyl groups attached to the ring struc... more | 241 | 886 | Details |
| Phenothiazine Derivatives | Not Available | 9 | 30 | Details |
| Phenothiazines | Compounds containing dibenzo-1,4-thiazine. Some of them are neuroactive. | 31 | 206 | Details |
| Phenothiazines With Aliphatic Side-Chain | Not Available | 7 | 83 | Details |
| Phenothiazines With Piperazine Structure | Not Available | 10 | 49 | Details |
| Phenothiazines With Piperidine Structure | Not Available | 4 | 26 | Details |
| Phenoxyacetates | Derivatives of phenoxyacetic acid, including its salts and esters. | 3 | 8 | Details |
| Phenoxypropanolamines | Compounds based on a propanolamine attached via an OXYGEN atom to a phenoxy ring. The s... more | 20 | 104 | Details |
| Phenyl Ethers | Ethers that are linked to a benzene ring structure. | 42 | 134 | Details |
| Phenylacetates | Derivatives of phenylacetic acid. Included under this heading are a variety of acid for... more | 25 | 85 | Details |
| Phenylalanine Hydroxylase Activator | Not Available | 1 | 6 | Details |
| Phenylalanine Hydroxylase Activators | Not Available | 2 | 13 | Details |
| Phenylalanine Metabolizing Enzyme | Not Available | 1 | 1 | Details |
| Phenylalkylamine Derivatives | Not Available | 5 | 69 | Details |
| Phenylammonium Compounds | QUATERNARY AMMONIUM COMPOUNDS based on PHENYLAMINES with the general formula phenyl-N+R3. | 2 | 4 | Details |
| Phenylbutazone derivatives | Not Available | 0 | 0 | Details |
| Phenylcarbamates | Phenyl esters of carbamic acid or of N-substituted carbamic acids. Structures are simil... more | 7 | 17 | Details |
| Phenylethanolamine N-Methyltransferase, antagonists & inhibitors | Not Available | 1 | 4 | Details |