azuleno,furan,dione
Furan
100198-67-2Propanedioic acid,1,3-dithiolan-2-ylidene-,bis(1-methylethyl) ester,mixt. with 2,3-dihydro-2,2-dimethyl-7-benzofuranyl methylcarbamate
68024-36-2(3aS,4S,5R,6E,8R,10E,11aR)-5-Acetoxy-2,3,3a,4,5,8,9,11a-octahydro-8-hydroxy-10-hydroxymethyl-3-methylene-4-[[(Z)-2-methyl-1-oxo-2-butenyl]oxy]-2-oxocyclodeca[b]furan-6-carboxylic acid methyl ester