Flueggines A and B, two new dimeric indolizidine alkaloids from Flueggea virosa.

Institute of Traditional Chinese Medicine & Natural Products, Jinan University, Guangzhou 510632, People's Republic of China.
Organic Letters (Impact Factor: 6.14). 08/2011; 13(15):3888-91. DOI: 10.1021/ol201410z
Source: PubMed

ABSTRACT Two unprecedented C,C-linked dimeric indolizidine alkaloids, flueggines A (1) and B (2), were isolated from the twigs and leaves of Flueggea virosa. The structures and absolute configurations were elucidated by means of NMR, single-crystal X-ray diffraction, and CD analyses. Compound 1 is the first example of Securinega alkaloids bearing an isoxazolidine ring, the plausible biogenetic pathway of which is also proposed. Compound 2 exhibited growth inhibitory activity against MCF-7 and MDA-MB-231 human breast cancer cells.

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