Their structures were elucidated by analysis of 1D and 2D NMR spectroscopic data. The known compounds were identified by comparison of the NMR data, especially 1H and 13C NMR data, with those previously reported in literatures.
Their structures were elucidated by analysis of 1D and 2DNMR spectroscopic data. The known compounds were identifiedby comparison of the NMR data, especially 1H and 13C NMR data,with those previously reported in literatures.