680189-82-6 1H-Indeno[4,5-c]furan-7-carboxylic acid,7-[[(1,1-dimethylethoxy)carbonyl]amino]-3,3a,4,6,7,8,8a,8b-octahydro-5-methyl-1,3-dioxo-, methyl ester 173011-09-1 1H-Indeno[4,5-c]furan, 3,3a,4,5,6,7,8,8b-octahydro-6,6,8(or 784152-38-1 1H-Azuleno[4,5-c]pyrrole-2,8,8(3H,4H)-tricarboxylic acid,3a,5,7,9-tetrahydro-6-methyl-5-oxo-, 2-(1,1-dimethylethyl) 8,8-diethylester