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Full scan mass spectrum of the protonated molecular ion of neurounina-1 – m/z = 365.3 (A), ion product of neurounina-1 – m/z = 83.9 (B), protonated molecular ion of ropivacaine – m/z = 275.16 (C), and the ion product of ropivacaine – m/z = 126.09 (D).
