Synonyms: 2-Butenoicacid, 2-methyl-,1-(3-furanyl)-2-(hexahydro-5-hydroxy-7a,7b,9-trimethyl-4,7-ethano-2H-oxireno[h][2]benzopyran-4(5H)-yl)ethylester, [1aR-[1aa,3aa,4a,4[R*(Z)],5b,7a,7aa,7ba,9R*]]-; 4,7-Ethano-2H-oxireno[h][2]benzopyran,2-butenoic acid deriv.; Pteroneeniol