Table 6

MSMS spectrum of the MNH4+ ion (m/z 429) from the positive ion APCI spectrum of metabolite M-2 or carboxy-celecoxib

Ionm/z%
MNH4 + 4294
MNH4 + − NH3 − HF412100
MNH4 + − NH3 39219
MNH4 + − NH3 − HNO2S33310