A new C22 polyacetylene and seven isoprenylated pterocarpans from Erythrina subumbrans

AbstractAbstractA new C22 polyacetylene, erysectol A (1), and seven isoprenylated pterocarpans, phaseollin (2), phaseollidin (3), cristacarpin (4), (3′R)-erythribyssin D/(3′S)-erythribyssin D (5a/5b) and dolichina A/dolichina B (6a/6b) were isolated from the twigs and leaves of Erythrina subumbrans. Their structures were determined based on their NMR spectral data. Except for 2–4, all the other compounds were isolated from this plant for the first time. Erysectol A was the first reported C22 polyacetylene from plants. Polyacetylene was isolated from Erythrina plants for the first time.Graphical AbstractKeywords: ErythrinaErythrina subumbransC22 polyacetyleneisoprenylated pterocarpans Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis research was funded by the National Natural Science Foundation of China [No. 32060099].