Sweet and bitter principles of the Chinese plant drug, Bai-Yun-Shen: Revision of the assignment of the source plant and isolation of two new diterpene glycosides.
Acylated Flavone and Iridoid Glucoside from Pothos cathcarti
作者:Biswanath Dinda、Partha Sarathi Ghosh
DOI:10.1007/s10600-013-0788-5
日期:2013.11
presence of a C-5 hydroxyl group. The IR spectrum in KBr showed the presence of a hydroxyl (3437 cm–1), an , -unsaturated carbonyl (1660 cm–1), and an aromatic ring (1612 cm–1). Inspection of the 1H and 13C NMR spectra (Table 1) showed that it was a 5,7,8-trisubstituted flavonoid. One of the substituents was a hydroxyl, the second was an acyl, and the third one was a methoxyl. The methoxyl signals, H 3