1(2H)-Phthalazinone, hydrazone, hydrochloride 1(2H)-Phthalazinone, hydrazone, monohydrochloride 1-Hydrazinophthalazine hydrochloride 1-Hydrazinophthalazine monohydrochloride 304-20-1 Aiselazine Apresoline hydrochloride C-5968 Dralzine Hydralazine chloride Hydralazine hydrochloride Hydralazine monohydrochloride Hydrallazine hydrochloride Hyperazin Hyperex Lopress NSC89394 Phthalazine, 1-hydrazino-, monohydrochloride Phthalazinone, hydrazone, monohydrochloride Slow-Apresolin WLN: T66 CNNJ BMZ & GH