Measured Mass (m/z)

Electron Paring

Nitrogen Rule

No. of Nitrogen(s)

Proposed Formula

Calculated Mass (m/z)

Error* (ppm)

559.2635

[M + H]⁺

EN

2

${\text{C}}_{33}{\text{H}}_{36}{\text{FN}}_2{\text{O}}_5^{\text{+}}$

559.2603

5.7

466.2046

EE

ON

1

${\text{C}}_{27}{\text{H}}_{29}{\text{FNO}}_5^{\text{+}}$

466.2024

4.7

448.1936

EE

ON

1

${\text{C}}_{27}{\text{H}}_{27}{\text{FNO}}_4^{\text{+}}$

448.1919

3.8

440.2239

EE

ON

1

${\text{C}}_{26}{\text{H}}_{31}{\text{FNO}}_4^{\text{+}}$

440.2232

1.6

422.2139

EE

ON

1

${\text{C}}_{26}{\text{H}}_{29}{\text{FNO}}_3^{\text{+}}$

422.2126

3.1

404.2032

EE

ON

1

${\text{C}}_{26}{\text{H}}_{27}{\text{FNO}}_2^{\text{+}}$

404.2020

3.0

380.1675

EE

ON

1

${\text{C}}_{23}{\text{H}}_{23}{\text{FNO}}_3^{\text{+}}$

380.1656

5.0

362.1561

EE

ON

1

${\text{C}}_{23}{\text{H}}_{21}{\text{FNO}}_2^{\text{+}}$

362.1551

2.8

318.1654

EE

ON

1

C₂₂H₂₁FN⁺

318.1653

0.3

292.1508

EE

ON

1

C₂₀H₁₉FN⁺

292.1496

4.1

276.1194

EE

ON

1

C₁₉H₁₅FN⁺

276.1183

4.0

250.1038

EE

ON

1

C₁₇H₁₃FN⁺

250.1027

4.4