Theophylline 3D Molecular Model — CAS 58-55-9

Theophylline (C7H8N4O2, CAS 58-55-9) — a free educational 3D molecular model for teachers and students, by MolGod.org. Every atom carries its engraved element symbol (C, H, O, N...), so no colour key is needed. Look at the skeleton first: Theophylline contains two rings (one 5-membered and one 6-membered), fused along a shared edge, one of them aromatic, and students can trace 22 bonds (15 single, 3 double and 4 aromatic). Quick starter: ask students to count the engraved symbols (7 C + 8 H + 4…

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