The molecular formula, C42H70O15, was deduced from its HRESIMS data (m/z 837.4601 [M + Na]+, calcd for C42H70O15Na, 837.4612) and 13C NMR data (Table 1). The IR spectrum showed the presence of hydroxy (3387 cm−1) and α,β-unsaturated carbonyl (1675 cm−1) groups.