Abstract
Two new flavonoids, named cambodianins D (1) and E (2), together with two known flavanes (2S)-7,4′-dihydroxy-6,8-dimethylflavane (3) and (2S)-7,3′-dihydroxy-4′-methoxy-8-methylflavane (4), were isolated from dragon's blood of Dracaena cambodiana. The new compounds were determined by HR-ESI-MS and spectroscopic techniques (UV, IR, 1D, and 2D NMR). Compounds 1–3 exhibited antimicrobial activities.
Acknowledgments
This research was financially supported by the National Natural Sciences Foundation of China (No. 31070321), Natural Science Foundation of Hainan Province (No. 310083), and National Nonprofit Institute Research Grant of CATAS-ITBB (No. ITBBZD 1041).
Notes
1. These authors contributed equally to this study.