New rocaglamide derivatives from Vietnamese Aglaia species.

Phytochemical analysis of the leaves of different Aglaia species collected in Vietnam yielded eight rocaglamide derivatives, which are responsible for the strong insecticidal activity against Spodoptera littoralis, including rocaglamide A (1), rocaglamide 1 (2), rocaglamide W (3), rocaglamide AB (4), rocaglamide J (5), rocaglaol (6), rocaglamide S (7) and the new rocaglamide AY (8). The structures of these compounds were elucidated through extensive 1D and 2D NMR spectroscopy and analysis of their mass spectrometric (ESI-MS) and HRESIMS data.