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. 2014 Apr 3;9(4):e93764. doi: 10.1371/journal.pone.0093764

Table 1. Concentrations of four main lignans and stilbenoids in pine knot extract (PKE) and composition of lignan-stilbenoid (LS) mixture.

Polyphenol PKE PKE (40 mg/l) LS mixture (40 μM)
(w/w %) (μM) (μM)
Methylpinosylvin 10 20 21.4
Nortrachelogenin 7 7 6.8
Pinosylvin 4 10 9.6
Matairesinol 1.5 2 2.2