Benzotriazine

A chemical compound containing a benzene ring fused to a six-membered ring with three nitrogen atoms, used in pharmaceutical and materials research.

From 'benzo-' (benzene) + 'triazine' (six-membered ring with three nitrogens; from 'tri-' meaning three, plus '-azine' from 'aza' meaning nitrogen-containing). Systematically named in the mid-20th century as heterocyclic chemistry expanded.