The effective components of Huanglian Jiedu
2016-6-20 · Compound 3 was obtained as a white powder. One methoxyl group was observed by the signal at δ 3.71 (3 H, s) in the 1 H NMR spectrum and the signal at δ 51.7 in the 13 C NMR spectrum of compound 3. The carbon signal appearing at δ 169.5 was deduced to be an ester carbonyl group.
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