Simultaneous Determination of Three Coumarins in <i>Angelica dahurica</i> by <sup>1</sup>H-qNMR Method: A Fast and Validated Method for Crude Drug Quality Control

<div>Structures of the internal standard and the reference standard.</div>

Journal of Analytical Methods in Chemistry

fig1

Figure 1

Figure 1: Simultaneous Determination of Three Coumarins in <i>Angelica dahurica</i> by <sup>1</sup>H-qNMR Method: A Fast and Validated Method for Crude Drug Quality Control 

Figure 1 | Simultaneous Determination of Three Coumarins in Angelica dahurica by 1H-qNMR Method: A Fast and Validated Method for Crude Drug Quality Control 