Chemicals and Drugs

Thymine

One of four constituent bases of DNA.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

One of four constituent bases of DNA.

Chemical Identity

Chemical Information

Molecular Formula
C5H6N2O2
Molecular Weight
126.11 g/mol
CAS Registry No.
65-71-4
IUPAC Name
5-methyl-1H-pyrimidine-2,4-dione
InChIKey
RWQNBRDOKXIBIV-UHFFFAOYSA-N
SMILES
CC1=CNC(=O)NC1=O
MeSH Unique ID
D013941
Source
PubChem CID 1135

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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MeSH Record

Synonyms

2 entry terms
  • 5-Methyluracil
  • 5 Methyluracil

MeSH Record

Aspects Covered

27 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analogs & derivatives, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, economics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Record

Indexing Annotation

thymine deoxyriboside, thymine deoxyribonucleoside = THYMIDINE

MeSH Hierarchy

Tree Number

  1. D03w.383.742.698.875w.899w

MeSH Record

NLM Classification

QU 58

AMA Style

References

  1. National Library of Medicine. Thymine. Medical Subject Headings (MeSH). 2026. Unique ID D013941. http://id.nlm.nih.gov/mesh/2026/D013941
  2. Thymine. In: Wikipedia. https://en.wikipedia.org/wiki/Thymine
  3. Thymine. In: Wikidata. https://www.wikidata.org/wiki/Q171973
  4. Thymine. In: PubChem Compound. CID 1135. https://pubchem.ncbi.nlm.nih.gov/compound/1135