(-)-Ibuprofen (-)-Ibuprophen (-)-alpha-Methyl-4-(2-methylpropyl)benzeneacetic acid (R)-(-)-Ibuprofen (R)-2-(4-Isobutylphenyl)propanoic acid (R)-Ibuprofen (alphaR)-alpha-Methyl-4-(2-methylpropyl)benzeneacetic acid 51146-57-7 Benzeneacetic acid, alpha-methyl-4-(2-methylpropyl)-, (R)- Benzeneacetic acid, alpha-methyl-4-(2-methylpropyl)-, (alphaR)- (9CI) R-(-)-p-Isobutylhydratropic acid alphaR-Sethyl-4-(2-methylpropyl)benzeneacetic acid benzeneacetic acid, alpha-methyl-4-(2-methylpropyl)-, (alphaR)- l-Ibuprofen