From molecular structure of 3-Aminopyridazine hydrochloride (CAS NO.89203-22-5) ,we can know: Canonical SMILES: C1=CC(=NN=C1)N.Cl InChI: InChI=1S/C4H5N3.ClH/c5-4-2-1-3-6-7-4;/h1-3H,(H2,5,7);1H InChIKey: GCRUEXFJNQVIJM-UHFFFAOYSA-N