Figure 2.

(a) Mass spectra of Memantine parent ion (Q1). (b) Mass spectra of Memantine product ion (Q3). (c) Mass spectra of Memantine-D6 parent ion. (d) Mass spectra of Memantine-D6 product ion (Q3).

(a) Mass spectra of Memantine parent ion (Q1). (b) Mass spectra of Memantine product ion (Q3). (c) Mass spectra of Memantine-D6 parent ion. (d) Mass spectra of Memantine-D6 product ion (Q3).