Observed Mass (m/z)^a

(MS/MS)

ID

Measured Mass (m/z) (MS³)

Electron Paring

Nitrogen Rule

No. of Nitrogen (s)

Proposed Formula

Theoretical Mass^b (m/z)

479.3 (F1)

${\text{C}}_{31}{\text{H}}_{28}{\text{FN}}_{\text{2}}{\text{O}}_2^{-}$

F5

477.2

EE

EN

2

C₃₁H₂₆FN₂O₂⁻

477.2

F6

461.2

EE

EN

2

C₃₀H₂₂FN₂O₂⁻

461.2

F3

397.3

EE

ON

2

C₂₆H₂₂FN₂O⁻

397.2

F7

360.2

EE

ON

1

C₂₄H₂₃FNO⁻

360.2

F8

342.3

EE

ON

1

C₂₃H₁₇FNO⁻

342.1

F4

278.2

EE

ON

1

C₁₉H₁₇FN⁻

278.1

453.2 (F2)

${\text{C}}_{\text{29}}{\text{H}}_{\text{26}}{\text{FN}}_{\text{2}}{\text{O}}_2^{-}$

F3

397.2

EE

EN

2

C₂₆H₂₂FN₂O⁻

397.2

F4

278.2

EE

ON

1

C₁₉H₁₇FN⁻

278.1

397.2 (F3)

C₂₆H₂₂FN₂O⁻

F4

278.2

EE

ON

1

C₁₉H₁₇FN⁻

278.1

F9

262.2

EE

ON

1

C₁₈H₁₃FN⁻

262.1

278.1 (F4)

C₁₉H₁₇FN⁻

F10

276.2

EE

ON

1

C₁₉H₁₅FN⁻

276.1

F9

262.2

EE

ON

1

C₁₈H₁₃FN⁻

262.1