Synonyms: 2-Butenoicacid, 2-methyl-,9-(acetyloxy)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-10-ylester, [9R-[9a,10a(Z)]]-; Crotonic acid, 2-methyl-,10-ester with9,10-dihydro-9,10-dihydroxy-8,8-dimethyl-2H,8H-benzo[1,2-b:3,4-b']dipyran-2-oneacetate, (Z)- (8CI); Pteryxin (6CI,7CI); 2H,8H-Benzo[1,2-b:3,4-b']dipyran,2-butenoic acid deriv.; (+)-Pteryxin; Pterixin; Pteryxine