Table 2.
Free radical scavenging activities of isolated compounds.
| No. | Compounds | IC50 values (µmol/L) | Taxon |
|---|---|---|---|
| 31 | Platycloside A | >100 (DPPH); >100 (ABTS•+) | l |
| 146 | Myricetrin | 29.98 ± 0.19 (DPPH); 16.02 ± 0.21 (ABTS•+) | l |
| 147 | 5,8,3′,4′-Tetrahydroxy-flavone-7-O-β-D-xylopyranoside | 21.50 ± 0.25 (DPPH); 13.78 ± 0.21 (ABTS•+) | l |
| 148 | Isomassonianoside B | 66.19 ± 0.99 (DPPH); 32.25 ± 0.23 (ABTS•+) | l |
| 149 | (-)-Isopramine 9′-O-β-D-glucopyranoside | 29.13 ± 0.87 (DPPH); 26.37 ± 0.26 (ABTS•+) | l |
| 150 | (7R,8S,7′S,8′R)-4,9,4′,7′-Tetrahydroxy-3,3′-dimethoxy-7,9′-epoxylignan 4-O-β-D-glucopyranoside | 64.38 ± 0.78 (DPPH); 20.05 ± 0.23 (ABTS•+) | l |
| 151 | Sugiol | >100 (DPPH); >100 (ABTS•+) | l |
| 152 | Totarol | >100 (DPPH); >100 (ABTS•+) | l |
| 156I | Gallic acid | 5.99 ± 0.29 (DPPH) | o |
| 163II | Artemisetin | 0.0062 ± 0.0001 (ABTS•+) | m |
| 164II | Quercetin | 0.0135 ± 0.0001 (DPPH); 0.0019 ± 0.0000 (ABTS•+) | m |
| 165II | Isoscutellarein-8-O-β-D-glucuronopyranoside | 0.0519 ± 0.0104 (ABTS•+) | m |
| 166II | Quercetin-3-O-β-D-glucopyranoside | 0.0124 ± 0.0017 (DPPH); 0.0030 ± 0.0001 (ABTS•+) | m |
| 167II | Astragalin | 0.0139 ± 0.0000 (DPPH); 0.0070 ± 0.0000 (ABTS•+) | m |
| 168II | Hypolaetin-8-O-β-D-glucuronopyranoside | 0.0116 ± 0.0002 (DPPH); 0.0500 ± 0.0018 (ABTS•+) | m |
| 169II | Kaempferol 3-O-β-D-glucopyranosyl-(1 → 2)-O-α-L-xylopyranoside | 0.2443 ± 0.0327 (ABTS•+) | m |
| 170II | Uralenol | 0.0038 ± 0.0001 (DPPH); 0.0068 ± 0.0002 (ABTS•+) | m |
| 171II | (+)-Pinoresinol | 0.0146 ± 0.0012 (DPPH); 0.0046 ± 0.0000 (ABTS•+) | m |
| 172II | Rel-(3R,3′S,4R,4′S)-3,3′,4,4′-tetrahydro-6,6′-dimethoxy [3,3′-bi-2H-benzopyran]-4,4′-diol | 0.0511 ± 0.0154 (DPPH); 0.0028 ± 0.0001 (ABTS•+) | m |
| 173II | Matairesinol | 0.0447 ± 0.0043 (DPPH); 0.0024 ± 0.0000 (ABTS•+) | m |
| 174II | Cycloastragenol | 0.5977 ± 0.0178 (ABTS•+) | m |
| 175 | Quercetin-3-O-β-D-glucoside | 22.80 ± 0.95 (DPPH) | n |
| 176 | Kaempferol-3-O-(6′'-O-caffeoyl)-β-D-glucoside | 77.34 ± 7.20 (DPPH) | n |
| 177 | (−)-N-[3′,4′-Dihydroxy-(E)-cinnamoyl]-L-tyrosine | 78.73 ± 4.69 (DPPH) | n |
| 178 | (−)-N-[3′,4′-Dihydroxy-(E)-cinnamoyl]-3-hydroxy-L-tyrosine | 21.47 ± 0.46 (DPPH) | n |
| 179 | (−)-N-[3′,4′-Dihydroxy-(E)-cinnamoyl]-L-tyrosine methyl ester | 34.72 ± 2.91 (DPPH) | n |
| 180 | Chlorogenic acid methyl ester | 20.67 ± 1.04 (DPPH) | n |
| 181 | 4-O-Caffeoylquinic acid | 47.53 ± 3.42 (DPPH) | n |
| 182 | 3,4-O-Dicaffeoylquinic acid methyl ester | 9.09 ± 0.83 (DPPH) | n |
| 183 | 3,4,5-O-Tricaffeoylquinic acid methyl ester | 7.90 ± 0.32 (DPPH) | n |
| 184 | Caffeic acid | 48.21 ± 1.08 (DPPH) | n |
| 185I | Trilobatin | 51.59 ± 1.67 (DPPH) | o |
| 186I | Yanangdaengin | 5.03 ± 0.37 (DPPH) | o |
| 187 | 3,4-Dihydroxyphenylethanol | 19.90 (ABTS•+) | p |
| 188 | 1,2-Dihydroxyphenyl-alcohol-1-O-β-D-glucopyranoside | 10.0 (ABTS•+) | p |
| 189 | 2-Methoxyphenyl-alcohol-1-O-β-D-glucopyranoside | 15.0 (ABTS•+) | p |
| 190 | Arbutin | 4.5 (ABTS•+) | p |
| 191 | Orcinol glucoside | 19.0 (ABTS•+) | p |