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. No legend required: the element symbol is engraved on each atom. At its heart, Theophylline is built around two rings (one 5-membered and one 6-membered), fused along a shared edge, one of them aromatic. The model shows 22 bonds: 15 single, 3 double and 4 aromatic, drawn in Kekulé form. How many atoms can the class find? The engraved spheres give 7 C + 8 H + 4 N + 2 O, so the a…

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