zometapine zometapine zometapine (ci-781) is an antidepressant drug which is a pyrazolodiazepine derivative. its molecular structure closely resembles thienodiazepines and is unrelated to other antidepressant drug classes. zometapineidentifiers iupac name 4-(3-chlorophenyl)-1,3-dimethyl-6,7-dihydro-2h-pyrazolodiazepine cas number51022-73-2 ypubchem cid5361110chemspider4514671 nunii9171j97iqpcomptox dashboard (epa)dtxsid30965299 chemical and physical dataformulac14h15cln4molar mass274.75 g·mol−13d model (jsmol)interactive image smiles clc3cccc(c/2=n/cc/n=c1/n(n\c(=c1\2)c)c)c3 inchi inchi=1s/c14h15cln4/c1-9-12-13(10-4-3-5-11(15)8-10)16-6-7-17-14(12)19(2)18-9/h3-5,8,18h,6-7h2,1-2h3 nkey:cjgozevwxqgmcs-uhfffaoysa-n n ny (what is this?) (verify)