6,7-dehydroroyleanone

(-)-6-Dehydroroyleanone

(-)-12-Hydroxyabieta-6,8,12-triene-11,14-dione

(4bS,8aS)-1-hydroxy-4b,8,8-trimethyl-2-propan-2-yl-5,6,7,8a-tetrahydro phenanthrene-3,4-dione