Four new isoflavanones from Tadehagi triquetrum

摘要

Four new isoflavanones with isoprenoid units, named triquetrumones E-H (>1–4), were isolated from the whole plants of Tadehagi triquetrum. The structures were elucidated on the basis of spectroscopic analyses, including application of MS, UV, IR, 1D and 2D NMR spectroscopic techniques. Electronic Supplementary MaterialSupplementary material is available for this article at 10.1007/s13659-011-0033-5 and is accessible for authorized users.