| (26) uncinatone | R1 = 2H; | R2 = CH3; | R3 = H |
| (27) teuvincenone E | R1 = 2O; | R2 = CH3; | R3 = H |
| (34) (10R,16R)-12,16-epoxy-11,14,17-trihydroxy-17(15→16),18(4→3)-diabeo-abieta-3,5,8,11,13-pentaene-2,7-dione | R1 = O; | R2 = CH3; | R3 = OH |
| (35) (3S,4R,10R,16S)-3,4:12,16-diepoxy-11,14-dihydroxy-17(15→16),18(4→3)-diabeo-abieta-5,8,11,13-tetraene-7-one | R1 = 2H; | R2 = CHO; | R3 = H |
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