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Alphitonin is a flavonoid that has been found in L. leptolepis wood.1 It is also a metabolic intermediate that is formed during the catabolism of quercetin by the human gut bacteria E. ramulus.2,3

|1. Chen, K., Ohmura, W., Doi, S., et al. Termite feeding deterrent from Japanese larch wood. Bioresour. Technol. 95(2), 129-134 (2004).|2. Braune, A., Gütschow, M., Engst, W., et al. Degradation of quercetin and luteolin by Eubacterium ramulus. Appl. Environ. Microbiol. 67(12), 5558-55567 (2001).|3. Jaganath, I.B., Mullen, W., Lean, M.E.J., et al. In vitro catabolism of rutin by human fecal bacteria and the antioxidant capacity of its catabolites. Free Radic. Biol. Med. 47(8), 1180-1189 (2009).

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