Synonyms: Xanthalin;AC1O51AP;[(3R,4R)-2,2-dimethyl-3-[(E)-2-methylbut-2-enoyl]oxy-8-oxo-3,4-dihydropyrano[3,2-g]chromen-4-yl] (Z)-2-methylbut-2-enoate;2-Butenoic acid, 2-methyl-, 7,8-dihydro-8,8-dimethyl-2-oxo-2H,6H-benzo(1,2-b:5,4-b')dipyran-6,7-diyl ester, (6R-(6alpha(Z),7alpha(Z)))-;21800-48-6