Table 1.
Profiles of polyphenols in different litchi parts.
| Compound | RT * (min) |
ESI ** (M − H)-(m/z) |
Compound | Area % | |||
|---|---|---|---|---|---|---|---|
| Exo | Endo | Meso | |||||
| 1 | 20.24 | 577.1352 (M − H)− | Procyanidin B2 | 4.4 | 1.9 | - | Flavan-3-ol |
| 2 | 21.92 | 289.0716 (M − H)− | Epicatechin | 45.4 | 40.1 | 55.2 | Flavan-3-ol |
| 3 | 22.05 | 863.1824 (M − H)− | Epicatechin trimer | 1.0 | 1.7 | 0.6 | Flavan-3-ol |
| 4 | 22.58 | 863.1828 (M − H)− | Pavetannin B2 | 13.5 | 19.1 | 24.5 | Flavan-3-ol |
| 5 | 24.68 | 863.1832 (M − H)− | Epicatechin trimer | 0.7 | 1.3 | 0.9 | Flavan-3-ol |
| 6 | 28.05 | 609.1463 (M − H)− | Rutin (quercetin-3-O-rutinoside) |
7.2 | 2.4 | 14.7 | Flavonol glycoside |
| 7 | 28.46 | 593.1515 (M − H)− | Nicotiflorin (Kaempherol-3-rutinoside) | 1.9 | - | - | Flavonol glycoside |
| 8 | 28.48 | 577.1350 (M − H)− | Procyanidin B4 | 0.9 | 1.2 | - | Flavan-3-ol |
| 9 | 29.56 | 463.0893 (M − H)− | Quercetin-glucoside | 1.4 | - | - | Flavonol glycoside |
| 10 | 29.83 | 575.1191 (M − H)− | Procyanidin A2 | 16.4 | 25.1 | 2.7 | Flavan-3-ol |
| 11 | 30.53 | 863.1820 (M − H)− | Epicatechin trimer | 1.1 | 1.3 | 1.3 | Flavan-3-ol |
| 12 | 31.13 | 593.1505 (M − H)−
629.1276 (M + Cl − H)- |
Antirhinin (Cyanidin-3-rutinoside) |
4.8 | - | - | Anthocyanin |
| 13 | 33.12 | 575.1188 (M − H)- | Procyanidin A isomer | 1.3 | 6.0 | - | Flavan-3-ol |
* RT: retention time; ** ESI: electrospray ionization.