Molecule reference

Caffeine Structure, 3D Viewer, SMILES and Properties

Caffeine is a naturally occurring methylxanthine stimulant found in coffee, tea, cacao, and many beverages. This page provides the caffeine structure, identifiers, basic properties, drug class, and a direct MolDraw editor link.

Published: 6 Jun 2026 ยท Data identifiers cross-checkable with PubChem CID 2519

Structure

2D chemical structure of caffeine

Caffeine contains a fused xanthine ring system with three N-methyl substituents and two carbonyl groups. The structure is commonly used in teaching heterocycles, methylxanthines, and bioactive small molecules.

Draw or edit caffeine in MolDraw

3D Viewer

Loading caffeine 3D conformer...

The 3D preview loads a PubChem 3D conformer for visualization. It is useful for orientation and teaching, not a substitute for computational optimization.

Properties and Use

  • Common name: Caffeine
  • IUPAC name: 1,3,7-trimethylpurine-2,6-dione
  • Class: methylxanthine stimulant
  • Typical chemistry context: heterocyclic compounds, natural products, pharmacology examples, and structure drawing practice.