(-)-(3a,4R,7aR)-5,5-(ethylenedioxy)-4-(4-methylpentyl)-3a,4,5,6,7,7a-hexahydro-7a-methylindan-1-one

Phosphoric acid (1R,3aR,7aR)-1-tert-butoxy-7a-methyl-2,3,3a,6,7,7a-hexahydro-1H-inden-4-ylmethyl ester diethyl ester

(3R,3aR,7aR)-3-tert-Butoxy-3a,7-dimethyl-2,3,3a,4,5,7a-hexahydro-1H-indene

(3R,3aR)-3-tert-Butoxy-3a,7-dimethyl-3,3a,4,5-tetrahydro-2H-indene-1,6-dione

(1R,3aS,7aR)-1-tert-Butoxy-7a-methyl-2,3,3a,6,7,7a-hexahydro-1H-indene-4-carboxylic acid methyl ester