Table 1. pKa values of PIC and ISO, and molar fractions (f) in water solution at PH = 7.4.
| Piceatannol | Isorhapontigenin | ||
|---|---|---|---|
| pKa | 5.69 | pKa | 7.63 |
| f (PIC) | 0.8170 | f (ISO) | 0.6293 |
| f (PIC-) | 0.1830 | f (ISO-) | 0.3707 |
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