All individuals in MeSH

Label Id Description
Pyridazines D011724 [Six-membered rings with two adjacent nitrogen atoms also called 1,2-diazine. ]
Pyridines D011725 [Compounds with a six membered aromatic ring containing NITROGEN. The saturated version is PIPERIDINES. ]
Pyridinium Compounds D011726 [Derivatives of PYRIDINE containing a cation C5H5NH or radical C5H6N. ]
Pyridinolcarbamate D011727 [A drug that has been given by mouth in the treatment of atherosclerosis and other vascular disorders, hyperlipidemias, and thrombo-embolic disorders. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1408) ]
Pyridones D011728 [Pyridine derivatives with one or more keto groups on the ring. ]
Pyridostigmine Bromide D011729 [A cholinesterase inhibitor with a slightly longer duration of action than NEOSTIGMINE. It is used in the treatment of myasthenia gravis and to reverse the actions of muscle relaxants. ]
Pyridoxal D011730 [The 4-carboxyaldehyde form of VITAMIN B 6 which is converted to PYRIDOXAL PHOSPHATE which is a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. ]
Pyridoxal Kinase D011731 [An enzyme that catalyzes reversibly the phosphorylation of pyridoxal in the presence of ATP with the formation of pyridoxal 5-phosphate and ADP. Pyridoxine, pyridoxamine and various derivatives can also act as acceptors. EC 2.7.1.35. ]
Pyridoxal Phosphate D011732 [This is the active form of VITAMIN B 6 serving as a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. During transamination of amino acids, pyridoxal phosphate is transiently converted into pyridoxamine phosphate (PYRIDOXAMINE). ]
Pyridoxamine D011733 [The 4-aminomethyl form of VITAMIN B 6. During transamination of amino acids, PYRIDOXAL PHOSPHATE is transiently converted into pyridoxamine phosphate. ]
Pyridoxaminephosphate Oxidase D011734 [An enzyme catalyzing the deamination of pyridoxaminephosphate to pyridoxal phosphate. It is a flavoprotein that also oxidizes pyridoxine-5-phosphate and pyridoxine. EC 1.4.3.5. ]
Pyridoxic Acid D011735 [The catabolic product of most of VITAMIN B 6; (PYRIDOXINE; PYRIDOXAL; and PYRIDOXAMINE) which is excreted in the urine. ]
Pyridoxine D011736 [The 4-methanol form of VITAMIN B 6 which is converted to PYRIDOXAL PHOSPHATE which is a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. Although pyridoxine and Vitamin B 6 are still frequently used as synonyms, especially by medical researchers, this practice is erroneous and sometimes misleading (EE Snell; Ann NY Acad Sci, vol 585 pg 1, 1990). ]
Pyriform Sinus D056144 [A recess on each side in the wall of the HYPOPHARYNX. ]
Pyrilamine D011738 [A histamine H1 antagonist. It has mild hypnotic properties and some local anesthetic action and is used for allergies (including skin eruptions) both parenterally and locally. It is a common ingredient of cold remedies. ]
Pyrimethamine D011739 [One of the FOLIC ACID ANTAGONISTS that is used as an antimalarial or with a sulfonamide to treat toxoplasmosis. ]
Pyrimidine Dimers D011740 [Dimers found in DNA chains damaged by ULTRAVIOLET RAYS. They consist of two adjacent PYRIMIDINE NUCLEOTIDES, usually THYMINE nucleotides, in which the pyrimidine residues are covalently joined by a cyclobutane ring. These dimers block DNA REPLICATION. ]
Pyrimidine Nucleosides D011741 [Pyrimidines with a RIBOSE attached that can be phosphorylated to PYRIMIDINE NUCLEOTIDES. ]
Pyrimidine Nucleotides D011742 [Pyrimidines with a RIBOSE and phosphate attached that can polymerize to form DNA and RNA. ]
Pyrimidine Phosphorylases D057845 [Pentosyltransferases that catalyze the reaction between a pyrimidine nucleoside and orthophosphate to form a free pyrimidine and ribose-5-phosphate. ]