Nguyen Thi Thuy Linh, Khieu Thi Tam, Pham Duc Thang, Ba Thi Cham, Nguyen Thanh Tam, Nguyen Thi Hoang Anh

Main Article Content

Abstract

Heterostemma grandiflorum Cost. is a flowering plant of Asclepiadaceae family, distributed in Hoa Binh, Hanoi, Ha Nam,... provinces. We have reported first results about chemical constituents and cytotoxicity of Hgrandiflorum collected in Me Linh, Hanoi in the previous paper. Further study on dichloromethane and butanol extracts of Hgrandiflorum’s twigs and leaves, 8 compounds have been isolated. Their structures were elucidated by the 1D and 2D NMR spectroscopy and comparison with published data. They include two flavonoids: apigenin and thalassiolin C; a phenolic: vanillic acid; two triterpenes: 3b-stearyloxy-urs-12-ene, and 3b-acetoxy-22,23,24,25,26,27-hexanordammaran-20-one; and three nitrogen-containing compounds: heteromin A, uracil, and uridine. With exceptions to apigenin and heteromin A, the rest six compounds were found for the first time from Heterostemma genus.

Keywords: Heterostemma grandiflorum, flavonoid, triterpene, nitrogen-containing compounds.

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