2-Furancarboxylic acid, 2,5-dihydro-4-hydroxy-2-((4-hydroxy-3-(3-methyl-2-butenyl)phenyl)methyl)-3-(4-hydroxyphenyl)-5-oxo-, methyl ester 87414-49-1 alpha-Oxo-beta-(4-hydroxyphenyl)-gamma-(4-hydroxy-m-3,3-dimethylallylbenzyl)-gamma-methoxycarbonyl-gamma-butyrolactone butyrolactone I