1-(4-methylphenyl)-2-pyrrolidin-1-ylpentan-1-one 1-(4-methylphenyl)-2-pyrrolidin-1-yl-pentan-1-one 1-(4-methylphenyl)-2-1-pyrrolidinylpentan-1-one 1-Pentanone, 1-(4-methylphenyl)-2-(1-pyrrolidinyl)- PYROVALERONE Pirovalerona [INN-Spanish] Pyrovaleronum [INN-Latin] 4'-Methyl-2-(1-pyrrolidinyl)valerophenone