A new C₂₂ polyacetylene and seven isoprenylated pterocarpans from Erythrina subumbrans

Abstract

A 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 Abstract

Keywords:

• Erythrina
• Erythrina subumbrans
• C₂₂ polyacetylene
• isoprenylated pterocarpans

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This research was funded by the National Natural Science Foundation of China [No. 32060099].