endralazine endralazine endralazine is an antihypertensive of the hydrazinophthalazine chemical class. it is not approved for use in the united states. endralazineclinical dataatc codec02db03 (who) identifiers iupac name 6-benzoyl-3-hydrazinyl-5h,6h,7h,8h-pyridopyridazine cas number39715-02-1 ypubchem cid47608chemspider43316 nuniil44741f05pkeggd08254 ychemblchembl254193 ncomptox dashboard (epa)dtxsid40192791 chemical and physical dataformulac14h15n5omolar mass269.308 g·mol−13d model (jsmol)interactive image smiles c1ccc(cc1)c(=o)n2ccc3c(c/c(=n/n)/n3)c2 inchi inchi=1s/c14h15n5o/c15-16-13-8-11-9-19(7-6-12(11)17-18-13)14(20)10-4-2-1-3-5-10/h1-5,8h,6-7,9,15h2,(h,16,18) nkey:alaxzyhfvbsjkz-uhfffaoysa-n n ny (what is this?) (verify)