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(a) Parent ion mass spectra of sibutramine (SB), (b) product ion mass spectra of sibutramine, (c) parent ion mass spectra of N-des methyl sibutramine (DSB), (d) product ion mass spectra of N-des methyl sibutramine, (e) parent ion mass spectra of N-di des methyl sibutramine (DDSB), and (f) product ion mass spectra of N-di des methyl sibutramine.
