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Table 3 Putative metabolites observed using accurate mass after one-hour incubation with recombinant human MAO-A, 2D6 with retention times (rt), observed m/z and transitions

From: CYP450 phenotyping and accurate mass identification of metabolites of the 8-aminoquinoline, anti-malarial drug primaquine

Putative Metabolite (2D6)

Formula

m/z

ppm

rt (min)

Peak Area

% Area

Demethylation and Ketone formation

C14H17N3O2

260.139

0.1

0.74

5.26E + 04

0.7

Demethylation and Ketone formation

C14H17N3O2

260.139

−0.1

0.93

5.71E + 04

0.7

Demethylation and Ketone formation

C14H17N3O2

260.14

1.6

1.25

3.26E + 05

4.1

Di-Oxidation and Ketone Formation

C15H19N3O4

306.145

−0.1

1.31

3.19E + 03

0

Loss of CH2 + Oxidation

C14H19N3O2

262.155

−1

1.33

2.64E + 04

0.3

Loss of C5H12N2 + Di-Oxidation and Ketone Formation

C10H7NO4

206.045

−1.1

1.45

1.48E + 04

0.2

Oxidation

C15H21N3O2

276.171

0.6

1.96

8.10E + 04

1

Loss of CH2

C14H19N3O

246.16

−0.8

2.14

1.50E + 04

0.2

Oxidation

C15H21N3O2

276.171

2.6

2.17

4.40E + 05

5.5

Loss of CH2

C14H19N3O

246.161

1.6

2.52

1.46E + 05

1.8

Oxidation

C15H21N3O2

276.171

0.4

3.51

1.56E + 04

0.2

Oxidation & Ketone

C15H19N3O3

290.15

1.3

3.66

1.91E + 04

0.2

Oxidation

C15H21N3O2

276.171

1.4

3.68

7.90E + 04

1

Oxidation & Ketone

C15H19N3O3

290.151

2.5

3.85

2.27E + 03

0

Oxidation

C15H21N3O2

276.171

1

3.97

4.60E + 03

0.1

Oxidative Deamination to Ketone

C15H18N2O2

259.144

0.4

4.2

6.08E + 03

0.1

Oxidation

C15H21N3O2

276.171

1.3

4.21

6.32E + 04

0.8

Oxidative Deamination to Alcohol

C15H20N2O2

261.16

0.1

7.14

6.85E + 04

0.9

Putative Metabolite (MAO-A)

Formula

m/z

ppm

rt (min)

Peak Area

% Area

Loss of NH + Desaturation

C15H18N2O

243.15

1.5

4.2

4.15E + 03

0

Oxidative Deamination to Alcohol

C15C20N2O2

261.16

2.3

7.14

1.62E + 06

14.2