Table 1 Potential diagnostic cross-ring A4 ions in ESI− mode for each potential linkage position (1 → 4, 1 → 3, 1 → 6, 1 → 2) between the third and fourth hexose unit from the non-reducing end of TetraHexCer(t18:1/24:1-OH).

From: Discovery of novel neutral glycosphingolipids in cereal crops: rapid profiling using reversed-phased HPLC–ESI–QqTOF with parallel reaction monitoring

 

1 → 4

1 → 3

1 → 6

1 → 2

0,2A4

605.16

605.19

605.19

N.A

0,3A4

575.18

N.A

575.18

N.A

0,4A4

N.A

N.A

545.17

N.A

1,3A4

N.A

545.17

N.A

545.17

1,4A4

575.18

575.18

N.A

575.18

2,4A4

545.17

545.17

N.A

N.A

2,5A4

589.20

589.20

589.20

N.A

3,5A4

559.19*

N.A

559.19*

N.A

  1. *Existence of 3,5A4 with a m/z of 559.19 rules out the possibility of 1 → 2 and 1 → 3 linkages.
  2. N.A. not applicable.
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