日期:2023-04-21 18:08
狀態(tài):待解決
提問:kjcxac
his plant was separated and purified using silica gel column chromatography, Sephadex LH-20 column chromatography, semi-preparative high performance liquid chromatography, and recrystallization methods. The structures of obtained monomeric compounds were identified through modern spectral techniques by detail analysis of their electrospray ionization mass spectrometry, hydrogen and carbon nuclear magnetic resonance spectra data, as well as compared with the reported references. The results were
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