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MS2 and NL data on two related statins. Rosuvastatin and desmethyl rosuvastin (A) MS2 and (B) NL data, the MS2 data show few overlapping peaks (in red) while the NL spectra provide near complete overlap. Interestingly, while the NLs help facilitate similarity, the MS2 data provides more structurally distinguishing features. The red box denotes the only (minor) structural differences between the two molecules.
