Caffeine Molecular Structure - Chemical Formula and Diagram #42292 (License: Personal Use)

This image displays the 2D structural formula of caffeine (1,3,7-trimethylpurine-2,6-dione), a naturally occurring purine alkaloid. The molecule consists of a fused six-membered pyrimidinedione ring and a five-membered imidazole ring, with methyl groups attached to nitrogen atoms at positions 1, 3, and 7. Its planar heterocyclic structure underpins its ability to antagonize adenosine receptors in the brain.

Used in educational, scientific, and health-related web pages explaining pharmacology, biochemistry, nutrition, or food science; matches user intent for understanding caffeine’s chemical basis, studying organic chemistry, or researching stimulant mechanisms.