Table 2.
α-Amylase and α-glucosidase inhibitory activity of fifteen triterpenes expressed in mmol ACAE/g.
| Compounds | α-Amylase | α-Glucosidase |
|---|---|---|
| Cycloorbicoside A (1) | 0.14 ± 0.02 | NA |
| Cycloorbicoside A-7-monoacetate (2) | 0.33 ± 0.02 | NA |
| 3-O-β-d-Xylopyranoside-(23R,24S)-16β,23;16α,24-diepoxycycloart-25(26)-en-3β,7β-diol 2′,3′,4′,7-tetraacetate (3) | 0.29 ± 0.01 | 25.18 ± 0.02 |
| 3-O-β-d-Xylopyranoside-(23R,24S)-16β,23;16α,24-diepoxycycloart-25(26)-en-3β,7β-diol-7-monoacetate (4) | 0.42 ± 0.06 | 24.90 ± 0.09 |
| 3-O-β-d-Xylopyranoside-(23R,24S)-16β,23;16α,24-diepoxycycloart-25(26)-en-3β,7β-diol (5) | 0.55 ± 0.04 | 24.87 ± 0.12 |
| Cycloalpioside D (6) | 0.35 ± 0.06 | 24.08 ± 1.06 |
| Cycloalpioside D-2′,3′,4′,7-tetraacetate (7) | 0.33 ± 0.06 | 24.73 ± 0.04 |
| Cycloalpioside D-2′,3′,4′-triacetate (8) | 0.17 ± 0.01 | 24.82 ± 0.05 |
| 3-O-β-d-Xylopyranoside-20R-25-norcycloartan-3β,7β,16β-triol-20,24-olide (9) | 0.13 ± 0.09 | NA |
| Cycloorbicoside B (10) | 0.25 ± 0.02 | NA |
| Cyclosieversioside E (11) | 0.27 ± 0.01 | NA |
| Astragaloside IV (12) | 0.22 ± 0.03 | 19.36 ± 0.01 |
| Cyclosieversioside H (13) | 0.29 ± 0.01 | NA |
| Oleanolic acid (14) | 0.29 ± 0.01 | 20.02 ± 0.07 |
| Ursolic acid (15) | 0.45 ± 0.01 | 21.42 ± 0.01 |
Values are reported as mean ± S.D.; ACAE: Acarbose equivalent; and NA: not active.