Measured Mass (m/z)

Nitrogen Rule

No. of Nitrogen(s)*

Proposed Formula

Electron Paring

Calculated Mass (m/z)

Error** (ppm)

402.0739

ON

3

C₁₆H₁₅F₃N₃O₄S⁺

[M+H]⁺

402.0730

2.2

284.0204

ON

1

C₉H₉F₃NO₄S⁺

EE

284.0199

1.8

220.0582

ON

1

C₉H₉F₃NO₂⁺

EE

220.0580

0.9

190.0477

ON

1

C₈H₇F₃NO⁺

EE

190.0474

1.6

119.0610

EN

2

C₇H₇N₂⁺

EE

119.0604

5.0