Two new neolignans from the stems of Euonymus oblongifolius

摘要

Two new neolignans, (+)-(7R,8R)-4-hydroxy-3,3,5-trimethoxy-8,9-dinor-8,4- oxyneoligna-7,9-diol-7-aldehyde (1) and ()-(7S,8R)-4-hydroxy-3,3,5-trimethoxy-8, 9-dinor-8,4-oxyneoligna-7,9-diol-7-aldehyde (2), were isolated from the stems of Euonymus oblongifolius. Their chemical structures were determined according to HR-ESI-MS, CD, 1D and 2D NMR spectroscopic analyses.