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. 2015 Mar 18;20(3):4915–4927. doi: 10.3390/molecules20034915

Table 3.

The n-octanol-water partition coefficient of mitragynine.

Solvent Layer Mitragynine Content (µg/mL) at Different Buffer pH
pH 4 ** pH 7 ** pH 9 ** Water *
Octanol 17.97 20.54 18.45 20.74
Buffer 2.98 0.38 0.51 0.42
Calculated n-octanol/water partition coefficient 0.78 1.73 1.56 1.70

Note: *: logP; **: logD.