2-Hydrazino-2-imidazoline hydrobromide55959-84-7100 % similar 4,5-Dihydro-N-nitro-1H-imidazol-2-amine5465-96-338 % similar 2-Imidazolidinone120-93-436 % similar Clonidine4205-90-735 % similar Apraclonidine66711-21-535 % similar Lysidine (chemical)534-26-934 % similar Ethylene thiourea96-45-734 % similar Bisantrene78186-34-233 % similar Apraclonidine hydrochloride73218-79-833 % similar Clonidine hydrochloride4205-91-833 % similar Triaminoguanidine hydrochloride5329-29-330 % similar