(R)-2,3-dihydro-7-isopropyl-3,4-dimethyl-3-(3-tosyloxypropyl)naphtho<2,3-b>furan-2-one
6-hydroxy-5βH-abieta-6,8,11,13-tetraen-18-oic acid
6β-hydroxy-5βH-abieta-8,11,13-trien-18-oic acid 18,6β-lactone
6α-hydroxy-5βH-abieta-8,11,13-trien-18-oic acid 18,6α-lactone