. 2017 Feb 17;7:42977. doi: 10.1038/srep42977

Table 1. Desorption electrospray ionisation-imaging mass spectrometry (DESI-IMS) of abscisic acid (ABA) and 12-oxo-phytodienoic acid (OPDA).

Analyte	Chemical Formula	Exact Mass (Da)	Exact m/z [M-H]⁻	Detected m/z [M-H]⁻	Error (ppm)
ABA	C₁₅H₂₀O₄	264.1362	263.1289	263.128	−3.4
OPDA	C₁₈H₂₈O₃	292.2038	291.1966	291.196	−2.1