167621-24-1 N-(2,6-Dimethyl-4-((4-(methyl(2-phenylethyl)amino)-1-piperidinyl)carbonyl)phenyl)propanamide hydrochloride OPC-28326 Propanamide, N-(2,6-dimethyl-4-((4-(methyl(2-phenylethyl)amino)-1-piperidinyl)carbonyl)phenyl)-, monohydrochloride