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. 2021 Aug 12;11:16408. doi: 10.1038/s41598-021-95901-y

Table 1.

Anthocyanins identified across the three purple sweet potato varieties. YGM stands for 'Yamagawamurasaki', the cultivar from which the previous sweet potato anthocyanins were elucidated via NMR. Retention time is abbreviated to RT. RT value was obtained as the average RT of the specific peak across all purple-fleshed varieties. Average mass error of the Orbitrap Q-Exactive instrument for MS1 anthocyanin masses was ~ 0.002 Da.

Peak no. Tentative identification Acylation class RT (min) Observed m/z Supporting literature NMR literature
[M]+ Aglycone fragment ion Qualifying fragment ions
1 Cyanidin-3-sophoroside-5-glucoside YGM 0A Non 1.11 773.21 287.05 449.11, 611.16 38 37
2 Peonidin 3-sophoroside-5-glucoside YGM 0B Non 1.37 787.23 301.07 463.12, 625.17 38
3 Cyanidin-3-p-hydroxybenzoyl sophoroside-5-glucoside Mono 1.60 893.23 287.05 449.11, 731.18 38
4 Cyanidin-3- caffeoyl sophoroside-5-glucoside YGM 2 Mono 1.65 935.25 287.05 449.11, 773.19 38 36
5 Peonidin 3-p-hydroxybenzoyl sophoroside-5-glucoside Mono 1.96 907.25 301.07 463.12, 745.20 38
6 Peonidin 3-caffeoyl sophoroside-5-glucoside YGM 5B Mono 2.02 949.25 301.07 463.12, 787.21 36
7 Cyanidin-3-feruloyl sophoroside-5-glucoside Mono 2.24 949.25 287.05 449.11, 787.21 38
8 Peonidin-3-feruloyl sophoroside-5-glucoside Mono 2.99 963.27 301.07 463.12, 801.22 38
9 Cyanidin 3-caffeoyl sophoroside-5-glucoside YGM 2 Mono 3.30 935.25 287.05 449.11, 773.19 38 36
10.1 Cyanidin 3-caffeoyl-p-hydroxybenzoyl sophoroside-5-glucoside YGM 1A Di 3.52 1055.27 287.06 449.11, 893.21 38 37
10.2 Cyanidin 3-dicaffeoyl sophoroside-5-glucoside YGM 1B Di 3.55 1097.28 287.06 449.10, 935.23
11 Peonidin 3-caffeoyl sophoroside-5-glucoside YGM 5B Mono 4.45 949.25 301.07 463.12, 787.21 38 36
12.1 Peonidin 3-caffeoyl sophoroside-5-glucoside YGM 5B Mono 4.62 949.25 301.07 463.12, 787.21 38 36
12.2 Cyanidin-3-caffeoyl-feruloyl sophoroside-5-glucoside YGM 3 Di 4.62 1111.29 287.05 449.11, 949.24 38 37
13 Peonidin 3-dicaffeoyl sophoroside-5-glucoside YGM 4B Di 5.01 1111.29 301.07 463.12, 949.24 38 37
14 Peonidin 3-caffeoyl-p-hydroxybenzoyl sophoroside-5-glucoside YGM 5A Di 5.15 1069.28 301.07 463.12, 907.23 38 37
15 Peonidin-3-caffeoyl-feruloyl sophoroside-5-glucoside YGM 6 Di 6.62 1125.31 301.07 463.12, 963.25 38 37
16

Peonidin-3-caffeoyl-feruloyl sophoroside-5-glucoside OR

Cyanidin 3-diferuloyl sophoroside-5-glucoside

 YGM 6 Di 7.09 1125.31 287.05, 301.07 449.11, 963.25 38 37