参考文献:10.1002/mrc.2771 摘要:Zhang C, Wang R, Liu B, Tu G. Structure elucidation of a sodium salified anthraquinone from the seeds of Cassia obtusifolia by NMR technique assisted with acid–alkali titration. Magnetic Reson in Chemistry. 2011 Jul 14;49(8):529–32. doi: 10.1002/mrc.2771.