2,4-Dihydroxymethylcinnamate 2,5-Dihydroxycinnamic acid methyl ester 2-Propenoic acid, 3-(2,5-dihydroxyphenyl)-, methyl ester 63177-57-1 Methyl 2,5-dihydroxycinnamate Methyl 3-(2,5-dihydroxyphenyl)-2-propenoate