Megastigmanes isolated from Boehmeria nivea leaves and their immunomodulatory effect on IL-1β and IL-10 production in RAW264.7 macrophages
With the aim of isolating immunomodulatory compounds from the n-butanol extract of Boehmeria nivea leaves, nine megastigmane compounds were identified. Among these, the structure of the new compound 1, namely, “boehmegaside A”, was established using NMR and HR-ESI-MS, and its absolute configurations were established through ECD calculations and DP4+ analysis using DFT-NMR chemical shift calculatio
