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. Author manuscript; available in PMC: 2016 Nov 23.
Published in final edited form as: Mass Spektrom. 2016;13(2):83–94.

Figure 2.

Figure 2

Mass spectra of methyl: a – ortho-, b – para-, c – meta-S-methoxycarbonylmercaptobenzoates; 13C-methyl d – ortho-, e – para-S-methoxycarbonylmercaptobenzoates; f – anhydride of trifluoroacetic and S-trifluoroacetyllmercaptobenzoic acids.