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New briaranes from B. excavatum.
| Structure | No. | Name | Bioactivity | Ref. |
|---|---|---|---|---|
 |
6 | Briacavatolide A (R1 = CH3, R2 = OH, R3 = β-OH) | - | [9] |
| 7 | Briacavatolide B (R1 = CH2OAc, R2 = OAc, R3 = β-OH) | - | [9] | |
| 8 | Briacavatolide C (R1 = CH3, R2 = OAc, R3 = α-OC(O)(CH2)2CH3) | IC50 (HCMV) = 18 μM a | [9] | |
| 10 | Briacavatolide E (R1 = CH3, R2 = OH, R3 = α-OC(O)(CH2)2CH3) | - | [10] | |
 |
9 | Briacavatolide D (R = CH2OH) | - | [10] |
 |
11 | Briacavatolide F | IC50 (HCMV) = 22 μM | [10] |
a HCMV (human cytomegalovirus).
