Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40538-018-0125-0/MediaObjects/40538_2018_125_Fig2_HTML.png)
LC/ESI-FTICR TIC chromatogram acquired in negative ion mode of root crude extract of horseradish. Mass spectra of the main peaks corresponding to sinigrin (found at m/z 358.02747) and rustoside (found at m/z 579.13611), and their molecular structures are reported in the insets