| Pyridines | Compounds with a six membered aromatic ring containing NITROGEN. The saturated version ... more | 297 | 1636 | Details |
| Pyridinium Compounds | Derivatives of PYRIDINE containing a cation C5H5NH or radical C5H6N. | 3 | 8 | Details |
| Pyridones | Pyridine derivatives with one or more keto groups on the ring. | 11 | 55 | Details |
| Pyrimidine Analog | Not Available | 2 | 4 | Details |
| Pyrimidine Analogues | Not Available | 10 | 104 | Details |
| Pyrimidine Derivatives | Not Available | 1 | 3 | Details |
| Pyrimidine Nucleosides | Pyrimidines with a RIBOSE attached that can be phosphorylated to PYRIMIDINE NUCLEOTIDES. | 78 | 256 | Details |
| Pyrimidine Nucleotides | Pyrimidines with a RIBOSE and phosphate attached that can polymerize to form DNA and RNA. | 30 | 128 | Details |
| Pyrimidine Synthesis Inhibitor | Not Available | 1 | 7 | Details |
| Pyrimidines | A family of 6-membered heterocyclic compounds occurring in nature in a wide variety of ... more | 249 | 1157 | Details |
| Pyrimidinones | Heterocyclic compounds known as 2-pyrimidones (or 2-hydroxypyrimidines) and 4-pyrimidon... more | 75 | 463 | Details |
| Pyroglutamyl-Peptidase I, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Pyrophosphate Analog | Not Available | 0 | 0 | Details |
| Pyrophosphate Analog DNA Polymerase Inhibitor | Not Available | 1 | 4 | Details |
| Pyrrolidines | Compounds also known as tetrahydropyridines with general molecular formula (CH2)4NH. | 53 | 177 | Details |
| Pyrrolidinones | A group of compounds that are derivatives of oxo-pyrrolidines. A member of this group i... more | 20 | 57 | Details |
| Pyruvate Dehydrogenase Complex, antagonists & inhibitors | Not Available | 1 | 6 | Details |
| Pyruvate Kinase Activator | Not Available | 1 | 10 | Details |
| Pyruvates | Derivatives of PYRUVIC ACID, including its salts and esters. | 4 | 31 | Details |
| QTc Prolonging Agents | Drugs known to produce QTc prolongation. | 383 | 3808 | Details |
| QTc shortening agents | Drugs demonstrated to have QTc interval shortening properties, which may lead to ventr... more | 2 | 50 | Details |
| Quaternary Ammonium Compounds | Derivatives of ammonium compounds, NH4+ Y-, in which all four of the hydrogens bonded t... more | 59 | 256 | Details |
| Quinazolines | Cyclic compounds that include atoms other than carbon in their ring structure. | 30 | 152 | Details |
| Quinazolinones | Chemicals with two conjoined aromatic rings incorporating two nitrogen atoms and one of... more | 5 | 7 | Details |
| Quinoline Derivatives | Not Available | 6 | 26 | Details |