(4aS,5S,8aS)-5,8a-dimethyl-3,4,4a,8a-tetrahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-6(5H)-one

(8aS)-5,8a-dimethyl-3,4,6,7,8,8a-hexahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-6-ol

(4aS,5S,8R,8aR)-8-Hydroxy-5-(2-hydroxy-ethyl)-5,8a-dimethyl-6-methylene-octahydro-naphthalen-1-one

(1S,4aS,8aR)-1,4a,5-Trimethyl-1-(2-triisopropylsilanyloxy-ethyl)-4a,7,8,8a-tetrahydro-1H-naphthalen-2-one

(4aS,5S,8aS)-6-Hydroxy-5,8a-dimethyl-5-(2-triisopropylsilanyloxy-ethyl)-octahydro-naphthalen-1-one