(+-)-1'-Methyl-3-(2-methylphenyl)spiro(benzo(b)thiophene-2(3H),4'-piperidine) maleate 123245-21-6 Spiro(benzo(b)thiophene-2(3H),4'-piperidine), 1'-methyl-3-(2-methylphenyl)-, (+-)-, (Z)-2-butenedioate (1:1)