Alprazolam triazolobenzophenone
Alprazolam triazolobenzophenone is a chemical compound that is a prodrug for the benzodiazepine derivative alprazolam. At neutral pH it readily cyclizes to alprazolam, while in acidic conditions alprazolam undergoes a ring-opening reaction back to the ketone.
Source: Wikipedia — Alprazolam triazolobenzophenone (CC BY-SA 4.0)