**)  White crystals, Mp 000--000 °C (petrol/CHCl~0~); UV (CHCl~0~) λ~max~ (log ε) 000 (0.00), 000 (0.00), 000 (0.00) nm; IR (KBr) ν~max~ 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000 cm^−0^; ^0^H and ^00^C NMR ([Table 0](#marinedrugs-00-00000-t000){ref-type="table"}); HRESIMS *m/z* 000.0000 (M + H)^+^ (calculated for C~00~H~00~O~0~, 000.0000).  ### 0.0.0. 