Synonyms: 2-Butenoicacid, 3-methyl-, (7S)-7,8-dihydro-8,8-dimethyl-2-oxo-2H,6H-benzo[1,2-b:5,4-b']dipyran-7-ylester (9CI); 2-Butenoic acid, 3-methyl-,7,8-dihydro-8,8-dimethyl-2-oxo-2H,6H-benzo[1,2-b:5,4-b']dipyran-7-yl ester,(S)-; Crotonic acid, 3-methyl-, ester with7,8-dihydro-7-hydroxy-8,8-dimethyl-2H,6H-benzo[1,2-b:5,4-b']dipyran-2-one, (+)-(8CI); Decursin (7CI); 2H,6H-Benzo[1,2-b:5,4-b']dipyran, 2-butenoic acidderiv.; (+)-Decursin