Ibuprofen Standard

α-Methyl-4-(isobutyl)phenylacetic Acid; (±)-2-(4-Isobutylphenyl)propanoic Acid; Benzeneacetic acid,a-methyl-4-(2-methylpropyl), (±); (±)-p-Isobutylhydratropic acid; (±)-2-(p-Isobutylphenyl)propionic acid (USP);