138559-53-2

2-Butenoic acid,2-methyl-,(9R,10R)-9,10- dihydro-10-[[(2E)-3-(4-hydroxyphenyl)-1- oxo-2-propenyl]oxy]-8,8-dimethyl-2-oxo-2H,- 8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester,(2Z)-