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. 2012 Jun;56(6):2819–2823. doi: 10.1128/AAC.05344-11

Fig 1.

Fig 1

Representative chromatograms using the BP-HPLC method (CDP-1M coelutes with another impurity). The main peak just before 12.30 min is vancomycin B. Chromatogram profiles are stacked for clarity. The retention time of the vancomycin peak in the test products was consistent with the USP reference standard.