54676-88-9

Disenecioyl-cis-Khellactone Bis(3-methyl-2-butenoic acid)(9R,10R)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9,10-diyl ester 2-Butenoic acid, 3-methyl-, 1,1'-[(9R,10R)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9,10-diyl] ester