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. Author manuscript; available in PMC: 2013 Nov 1.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2012 Oct 3;908:76–86. doi: 10.1016/j.jchromb.2012.09.014

Fig. 2.

Fig. 2

(A) Coupled mass spectrum of rapamycin in Electrospray Ionization (ESI) positive scan mode with sodium adduct, precursor ion mass to charge ration (m/z) [M+Na]+: 936.6 Da, product ions m/z (m1) 409.3 and (m2) 345.3 Da. (B) Coupled mass spectrum of erythromycin in Electrospray Ionization (ESI) positive scan mode with proton adduct, precursor ion mass to charge ration (m/z) [M−H]−: 734.4, product ion m/z (m1) 576.3 and (m2) 158.2 Da.