Synonyms: Isovalericacid, 6-ester with 7,8-dihydro-6,7-dihydroxy-8,8-dimethyl-2H,6H-benzo[1,2-b:5,4-b']dipyran-2-one2-methylcrotonate, (-)- (8CI); 2H,6H-Benzo[1,2-b:5,4-b']dipyran, 2-butenoicacid deriv.; 2H,6H-Benzo[1,2-b:5,4-b']dipyran-2-one,7,8-dihydro-6,7-dihydroxy-8,8-dimethyl-, 6-isovalerate 7-(2-methylcrotonate),(-)- (8CI); Crotonic acid, 2-methyl-, 7-ester with7,8-dihydro-6,7-dihydroxy-8,8-dimethyl-2H,6H-benzo[1,2-b:5,4-b']dipyran-2-oneisovalerate (8CI); AD I; AD I (coumarin derivative)