3-(3,5-dimethoxyphenyl)-2-methylpropanoic acid InChI=1/C12H16O4/c1-8(12(13)14)4-9-5-10(15-2)7-11(6-9)16-3/h5-8H,4H2,1-3H3,(H,13,14 benzenepropanoic acid, 3,5-dimethoxy-alpha-methyl-