Figure 1

UHPLC-HRMS identification of (-)-trans-CBDP and (-)-trans-Δ9-THCP. Extracted ion chromatograms (EIC) of CBDP and Δ9-THCP from a standard mixture at 25 and 10 ng/mL respectively (a) and from the native (red plot) and decarboxylated (black plot) FM2 (b). (c,d) Comparison of the high-resolution fragmentation spectra of synthetic and natural CBDP and Δ9-THCP in both positive (ESI+) and negative (ESI−) mode.