Pretreatment methods | Neoastilbin | Astilbin | Neoisoastilbin | Isoastilbin | ||||
---|---|---|---|---|---|---|---|---|
(μg/g) | (%) | (μg/g) | (%) | (μg/g) | (%) | (μg/g) | (%) | |
Un-pretreated | 416.5 ± 6.96 | – | 3368.36 ± 35.51 | – | 125.05 ± 1.55 | – | 518.45 ± 7.18 | – |
Boiled | 1549.23 ± 37.85 |  + 271.96 | 3386.11 ± 174.17 | + 0.53 | 1517.53 ± 36.45 |  + 1113.54 | 640.24 ± 13.12 |  + 23.49 |
Steamed | 3125.3 ± 29.42 |  + 650.36 | 1437.91 ± 14.52 | − 57.31 | 845.22 ± 16.88 |  + 575.91 | 938.22 ± 10.29 |  + 80.97 |