Hi everybody, 

I am looking for good source of Licoisoflavone A MS/MS spectra. Unfortunately I don`t have analytical standard for this compound and I am trying to identify one compound from plant extract. Based on UV, MS and retention time I tentatively identified the compound as Licoisoflavone A. I have only one article (1) where I was able to find MS/MS and UV spectra. In second article I have (2) there are only [M + H]+ and UV. UV spectra differ between these two articles so I am little bit confused and don`t know what information to trust.  Therefore I am looking for other independent source of data. 

Thanks in advance to anyone who can help. 

Best 

Ivan 

1. Li, Y.-J. et al. Screening and characterization of natural antioxidants in four Glycyrrhiza species by liquid chromatography coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry. J. Chromatogr. A 1218, 8181–91 (2011).

2. Borquez, J., Kennelly, E. J. & Simirgiotis, M. J. Activity guided isolation of isoflavones and hyphenated HPLC-PDA-ESI-ToF-MS metabolome profiling of Azorella madreporica Clos. from northern Chile. Food Res. Int. 52, 288–297 (2013).