To investigate if other microginins are being produced by M. aeruginosa LEGE 91341, each VLC fraction was analyzed by LC-HRESIMS/MS. Raw data files of each fraction but also the blanks of the run were converted to the mzML format with MSConvert, using the parameters recommended for GNPS molecular networking. The appropriate files were uploaded to the GNPS web platform using the default parameters recommended for high resolution mass spectrometry data. The molecular networking was created with feature-based molecular networking analysis on GNPS and visualized in Cytoscape 3.9.0.