The spectra in the network were compared against GNPS spectral libraries and our 3 libraries built in this work. Matches between network spectra and library spectra were required to have a cosine score above 0.6 and at least 5 matched peaks. The molecular networking data were analyzed and visualized using Cytoscape (ver. 3.10.0) and was used for the dereplication of new putative oxylipins studying the fragmentation patterns as described in the Technical Validation section. The construction of the pie charts that will be visualized on the feature based molecular network (FBMN) is based on the peak heights of the corresponding feature in each sample.