2,4-Imidazolidinedione, 5-(4-methylphenyl)-5-phenyl-3-(3-(4-phenyl-1-piperidinyl)propyl)-, (Z)-2-butenedioate (1:1) 3-(3-(4-Phenyl-1-piperidyl)propyl)-5-phenyl-5-(4-tolyl)hydantoin maleate 56079-88-0 TR 2993