Fragment Ions

Predicted formula

Calculated mass (Da)

Observed mass (Da)

Error (mDa)

Error (ppm)

DBE

[M + H]⁺

C₃₇H₄₃N₂O₆

611.3116

611.3118

0.2

0.3

17.5

[M + H-NH₂C₂H₃]⁺

C₃₅H₃₈NO₆

568.2694

568.2694

0

0

17.5

[M + H-NH₂C₃H₆O]⁺

C₃₄H₃₅NO₅

537.2510

537.2492

−1.8

−3.4

19.0

[M + H-NH₂C₁₀H₁₃O]⁺

C₂₇H₂₈NO₅

446.1962

446.1961

−0.1

−0.2

14.5

[M + H-NH₂C₁₉H₂₃O₂]⁺

C₁₈H₁₈NO₄

312.1232

312.1226

−0.4

−1.3

10.5

[M + H-NH₂C₂₅H₂₅O₄]⁺

C₁₂H₁₆NO₂

206.1176

206.1170

−0.6

−2.9

5.5

[M + H-C₇H₇O]⁺

C₃₀H₃₅N₂O₅

503.2543

503.2547

0.7

1.4

14.5

[M + H-C₉H₉O]⁺

C₂₉H₃₃N₂O₅

489.2384

489.2375

−0.9

−1.8

14.5

[M + H-C₁₉H₂₂NO₄]⁺

C₁₈H₂₁NO₂

283.1567

283.1560

−0.7

−2.5

9.0