A new homoisoflavonoid, (3R)-5,7-dihydroxy-6-methyl-3-(2′-hydroxy-4′-methoxybenzyl)-chroman-4-one (1), namely polygonatone H, in addition to fourteen known homoisoflavones (2–15) were isolated from the rhizome of Polygonatum Cyrtonema Hua. The structures were identified with the aid of 1D/2D NMR spectroscopic technologies. Compounds 2, 6, 8, 10, 11, 13, and 15 were isolated from P. Cyrtonema for the first time. Compound 1 showed cytotoxicities to human cancer cell lines with IC₅₀ values to comparable those of cisplatin.

中文翻译：

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玉竹H，一种新的具有细胞毒性的高异黄酮，来自玉竹。

除十四个以外，新的同型异黄酮，（3 R）-5,7-二羟基-6-甲基-3-（2'-羟基-4'-甲氧基苄基）-苯并-4-酮（1）已知homoisoflavones（2 - 15）从的根茎中分离玉竹黄精华。借助1D / 2D NMR光谱技术鉴定了结构。化合物2，6，8，10，11，13，和15从分离P.黄精首次。化合物1通过IC对人癌细胞系显示出细胞毒性相当于顺铂的_50个值。