Table 1: MS parameters for FAV and [13C15N] Favipiravir (IS).

Compound

Precursor

Product

Dwell time

Q1 pre-bias (V)

Collision energy (V)

Q3 pre-bias (V)

FAV

156.1

113.1

100

17

17

 21

IS

158.1

113

100

18

16

 19