Development and Optimization of an UPLC-QTOF-MS/MS Method Based on an In-Source Collision Induced Dissociation Approach for Comprehensive Discrimination of Chlorogenic Acids Isomers from Momordica Plant Species

Table 1

The UPLC-QTOF-MS/MS information of the annotated CQA, pCoQA, and FQA from Momordica plants extracts. The diagnostic ions ( and ) used for isomers differentiation are also shown and they were ubiquitous across all the molecules detected.

Rt (min)	M-H^−; Molecular formula	Measured	Calculated	Identity
6.25	C16H17O9	353.0873	353.0890	cis-4-CQA
6.40		353.0883	353.0873	trans-4-CQA
7.23	C16H17O8	337.0864	337.0923	cis-4-pCoQA
7.56		337.0923	337.0956	trans-4-pCoQA
7.77	C17H19O9	367.0947	367.1029	cis-4-FQA
7.98		367.0933	367.1021	trans-4-FQA
Diagnostic ions
—	C7H11O6 ()	191.0473	191.0556	Quinic acid-H^−
—	C7H9O5 ()	173.0370	173.0450	Quinic acid-H-H2O^−