alprazolam triazolobenzophenone alprazolam triazolobenzophenone alprazolam triazolobenzophenone is a chemical compound which can be both a synthetic precursor and 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 triazolobenzophenone. a series of related acyl derivatives was researched in the 1980s as injectable water-soluble prodrugs of alprazolam, but were never developed for medical use. subsequently, this compound has been detected as a designer drug, first being identified from a seizure in spain in march 2014. alprazolam triazolobenzophenoneidentifiers iupac name (phenyl)methanone cas number69505-70-0 ypubchem cid15567865chemspider48057672uniisc7mxp4h26comptox dashboard (epa)dtxsid60574454chemical and physical dataformulac17h15cln4omolar mass326.8 g·mol−13d model (jsmol)interactive image smiles cc1=nn=c(n1c2=c(c=c(c=c2)cl)c(=o)c3=cc=cc=c3)cn inchi inchi=1s/c17h15cln4o/c1-11-20-21-16(10-19)22(11)15-8-7-13(18)9-14(15)17(23)12-5-3-2-4-6-12/h2-9h,10,19h2,1h3key:wwadxoxmcnjjkr-uhfffaoysa-n