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. Author manuscript; available in PMC: 2020 May 28.
Published in final edited form as: Anal Chem. 2019 Oct 29;91(22):14498–14507. doi: 10.1021/acs.analchem.9b03292

Figure 3.

Figure 3.

Extracted ATDs for the fragments of (A) the parent dextromethorphan (DEX) and (B) its demethylated metabolite (DEX O-Me), confirming that the metabolite is the Odemethylated product, instead of the N-demethylated product. Parent drift time is shown as a dotted line in B.