| (42) caryopincaolide E | R1 = H; | R2 = H; | R3 = CH2OH |
| (43) caryopincaolide F | R1 = H; | R2 = OH; | R3 = CH3 |
| (56) 15,16-dihydroformidiol | R1 = H; | R2 = H; | R3 = COOCH3 |
| (58) 2α-hydrocaryopincaolide F | R1 = OH; | R2 = H; | R3 = CH3 |
| (42) caryopincaolide E | R1 = H; | R2 = H; | R3 = CH2OH |
| (43) caryopincaolide F | R1 = H; | R2 = OH; | R3 = CH3 |
| (56) 15,16-dihydroformidiol | R1 = H; | R2 = H; | R3 = COOCH3 |
| (58) 2α-hydrocaryopincaolide F | R1 = OH; | R2 = H; | R3 = CH3 |