4'-Methoxyvulpinic acid 481-64-1 Pinastric acid alpha-(3-Hydroxy-4-(4-methoxyphenyl)-5-oxo-2(5H)furanylidene)benzeneacetic acid methyl ester delta(sup 2(5H),alpha)-Furanacetic acid, 3-hydroxy-4-(p-methoxyphenyl)-5-oxo-alpha-phenyl-, methyl ester