spiro,benzofuran,cyclopentan,furan
Benzofuran
639088-44-14-ISOBENZOFURANCARBOXYLIC ACID,6-ETHYL-1,3,3A,4,5,7A-HEXAHYDRO-3-OXO-,METHYL ESTER,(3AR,4R,7AS)-REL-
100655-65-0Ethanone,1-(octahydro-3a,6-dihydroxy-3,7a-dimethyl-3,6-methanobenzofuran-5-yl)-, (3a,3ab,5b,6b,7ab)-