Measured Mass (m/z) (MS/MS)

ID

Measured Mass (m/z)

Electron Paring

Nitrogen Rule

No. of Nitrogen (s)

Proposed Formula

Calculated Mass

418 (PI-1)

C₂₄H₂₈N_{5 ${\text{O}}_2^{+}$}

Calculated: 418.2238

PI-3

390.0

EE

ON

5

C₂₂H₂₄N_{5 ${\text{O}}_2^{+}$}

390.2

PI-4

362.2

EE

ON

5

C₂₀H₂₀N_{5 ${\text{O}}_2^{+}$}

362.2

PI-10

345.1

OE

ON

5

C₂₁H₂₃N₅^•+

345.2

PI-6

306.1

EE

ON

5

C₁₈H_{20 ${\text{N}}_5^{+}$}

306.2

PI-7

291.2

OE

ON

5

C₁₇H₁₇N₅^•+

291.1

PI-8

235.0

EE

EN

4

C₁₄H_{11 ${\text{N}}_4^{+}$}

235.1

PI-9

207.2

EE

EN

2

C₁₄H_{11 ${\text{N}}_2^{+}$}

207.1

362 (PI-4)

C₂₀H₂₀N_{5 ${\text{O}}_2^{+}$}

Calculated: 362.1612

PI-4

362.2

EE

ON

5

C₂₀H₂₀N_{5 ${\text{O}}_2^{+}$}

362.2

PI-10

345.1

OE

ON

5

C₂₁H₂₃N₅^•+

345.2

PI-7

291.1

OE

ON

5

C₁₇H₁₇N₅^•+

291.1

352 (PI-5)

C₁₉H₂₂N_{5 ${\text{O}}_2^{+}$}

Calculated: 352.1768

PI-6

306.2

EE

ON

5

C₁₈H_{20 ${\text{N}}_5^{+}$}

306.2

PI-8

235.0

EE

EN

4

C₁₄H_{11 ${\text{N}}_4^{+}$}

235.1

PI-9

207.1

EE

EN

2

C₁₄H_{11 ${\text{N}}_2^{+}$}

207.1

345.0 (PI-11)

C₂₁H₂₃N₅^•+

(MS³)

PI-6

306.2

EE

ON

5

C₁₈H_{20 ${\text{N}}_5^{+}$}

306.2

PI-8

235.1

EE

EN

4

C₁₄H_{11 ${\text{N}}_4^{+}$}

235.1

PI-9

207.2

EE

EN

2

C₁₄H_{11 ${\text{N}}_2^{+}$}

207.1

306 (PI-6)

C₁₈H_{20 ${\text{N}}_5^{+}$}

Calculated: 306.1713

PI-8

235.1

EE

EN

4

C₁₄H_{11 ${\text{N}}_4^{+}$}

235.1

PI-9

207.1

EE

EN

2

C₁₄H_{11 ${\text{N}}_2^{+}$}

207.1

291(PI-7)

C₁₇H₁₇N₅^•+

Calculated: 291.1478

PI-8

235.1

EE

EN

4

C₁₄H_{11 ${\text{N}}_4^{+}$}

235.1

PI-11

194.1

EE

ON

1

C₁₄H₁₂N⁺

194.1

PI-12

192.1

EE

ON

1

C₁₄H₁₀N⁺

192.1

PI-13

167.1

EE

EN

0

C₁₃H₁₁⁺

167.1