CAS: 65-28-1 Molecular Formula: C18H23N3O4S Molecular Weight (g/mol): 377.459 MDL Number: MFCD00134201 InChI Key: OGIYDFVHFQEFKQ-UHFFFAOYSA-N Synonym: phentolamine mesylate,phentolamine mesilate,phentolamine methanesulfonate,oraverse,regitine mesylate,regitin methanesulphonate,regitine methanesulfonate,phentolamine mesylate usp,phentolamine methanesulphonate PubChem CID: 91430 IUPAC Name: 3-[N-(4,5-dihydro-1H-imidazol-2-ylmethyl)-4-methylanilino]phenol;methanesulfonic acid SMILES: CC1=CC=C(C=C1)N(CC2=NCCN2)C3=CC(=CC=C3)O.CS(=O)(=O)O