Table 2.
Antifouling activity of the investigated terpenoids against B. albicostatus cyprid larvae.
| Compound | Skeleton structure | EC50 (μg/cm2) | LC50 (μg/cm2) |
|---|---|---|---|
| Capsaicin (positive control) | - | 1.32 ± 0.02 b | > 250 |
| 8(14)-enyl-pimar-2′(3′)-en-4′(18′)-en-15′(16′)-en-dolabr-16,15,2′,3′-oxoan-16-one (1) | Dimeric diterpenoid | 13.94 ± 0.81 f | > 250 |
| Tagalsin C (2) | Diterpenoid | 0.65 ± 0.02 a | > 250 |
| Tagalsin I (3) | Dimeric diterpenoid | 11.67 ± 0.47 e | > 250 |
| lup-20(29)-ene-3β,28-diol (4) | Triterpenoid | 9.27 ± 0.30 d | > 250 |
| 3-oxolup-20(29)-en-28-oic acid (5) | Triterpenoid | 3.50 ± 0.24 c | > 250 |
| 28-hydroxylup-20(29)-en-3-one (6) | Triterpenoid | 8.73 ± 0.43 d | > 250 |
a–f
Values with different letters in the same column of EC50 are significantly different at p < 0.05 level.