(3aR,4aS,5S,7aS,8S,9aR)-4a-Benzyloxymethyl-5-hydroxy-8-methyl-decahydro-azuleno[6,5-b]furan-2-one

(3aR,4aS,7aS,8S,9aR)-4a-((benzyloxy)methyl)-8-methyldecahydroazuleno[6,5-b]furan-2,5-dione

((3aS,5R,8S,8aS)-3a-Benzyloxymethyl-8-methyl-3-oxo-1,2,3,3a,4,5,8,8a-octahydro-azulen-5-yl)-acetic acid

((3S,3aR,5S,8R,8aR)-3-((tert-butyldimethylsilyl)oxy)-5-(2-((tert-butyldimethylsilyl)oxy)ethyl)-8-methyl-1,2,3,3a,4,5,8,8a-octahydroazulen-3a-yl)methanol

(3S,3aR,7R,8S,8aR,9S)-3-((tert-butyldimethylsilyl)oxy)-8-methyl-6-oxooctahydro-1H-3a,7-methanoazulen-9-yl benzoate