Fragment Ions

Predicted formula

Calculated mass (Da)

Observed mass (Da)

Error (mDa)

Error (ppm)

DBE

[M + H]⁺

C₃₈H₄₄N₂O₆

625.3272

625.3270

−0.2

−0.3

18.0

[M + H-C₂H₅N]⁺

C₃₆H₄₀NO₆

582.2850

582.2842

−0.8

−1.4

17.5

[M + H-C₁₁H₁₇NO]⁺

C₂₇H₂₈NO₅

446.1962

446.1972

1

2.2

14.5

[M + H-C₉H₁₁O]⁺

C₂₉H₃₃N₂O₅

489.2384

489.2374

−1

−2.0

14.5

[M + H-C₁₈H₂₂NO₄]⁺

C₁₉H₂₂NO₂

297.1723

297.1733

1

3.4

9.5

[M + H-C₂₆H₂₉NO₄]⁺

C₁₂H₁₆NO₂

206.1176

206.1182

0.6

2.9

5.5