Table 6.
Inhibitory effect of isolated compounds from X. strumarium on ABTS+ radical scavenging activity.
| Entry | Products | Concentration (μg/mL) | Inhibition (%) | IC50 1 (μg/mL) |
|---|---|---|---|---|
| Trolox 2 | 16.66 | 95.06 | 7.43 ± 0.71 (29.72 μM) | |
| 8.33 | 54.14 | |||
| 3.33 | 34.52 | |||
| 1.66 | 17.27 | |||
| 1 | Protocatechuic acid | 16.66 | 97.22 | 4.94 ± 0.38 (32.93 μM) |
| 8.33 | 68.72 | |||
| 3.33 | 52.46 | |||
| 1.66 | 25.17 | |||
| 2 | 3-Hydroxy-1-(4-hydroxy phenyl) propan-1-one | 3.33 | - | - |
| 3 | Cytidine | 3.33 | - | - |
| 4 | Neochlorogenic acid methyl ester | 3.33 | 8.66 | - |
| 5 | Chlorogenic acid | 3.33 | 23.59 | - |
| 6 | Methyl-3,5-di-O-caffeoylquinic acid | 8.33 | 98.31 | 3.20 ± 0.28 (6.03 μM) |
| 3.33 | 69.25 | |||
| 1.66 | 33.69 | |||
| 0.33 | 7.49 | |||
| 7 | Thiazine-3,5-dione-11-O-glucopyranoside | 3.33 | - | - |
| 8 | Patuletin-3-glucuronide | 3.33 | 30.53 | - |
| 9 | Quercetin-3-O-glucuronide | 3.33 | 12.32 | - |
| 10 | 3,5-Di-O-caffeoylquinic acid | 3.33 | 40.74 | - |
| 11 | 1,5-Di-O-caffeoylquinic acid | 3.33 | 30.48 | - |
| 12 | 1,3-Di-O-caffeoylquinic acid | 3.33 | 22.12 | - |
| 13 | 1,3,5-Tri-O-caffeoylquinic acid | 3.33 | 38.06 | - |
| 14 | Raffinose | 3.33 | - | - |
1 The IC50 value was defined as the half-maximal inhibitory concentration and mean of 3 duplication analyses of each sample. 2 Trolox was used as the positive control. - is no activity.