(4-부톡시페닐)아세트아미드Butoxyphenylacetamidep-butoxyphenylacetamideBufexamac EP Impurity DBufexamac impurity D CRS4-butoxy-benzeneacetamid4-BUTOXYBENZENEACETAMIDE(4-BUTOXYPHENYL)ACETAMIDE2-(p-butoxyphenyl)acetamide2-(p-butoxyphenyl)-acetamid2-(4-butoxyphenyl)acetamide