Kinotannic acid is the chief constituent of the
kino gum, of which it contains 70 to 80 per cent. Kino also contains kino red, a
phlobaphene produced from kinotannic acid by oxidation.[2] It is closely related to the
tannin from
catechu; its non-glucosidal nature was established by Bergholz.[3][4]
^Holdsworth, David; Gideon, Osia; Pilokos, Bospidik (January 1989). "Traditional Medicine of New Ireland, Papua New Guinea Part III Konos, Central New Ireland". International Journal of Crude Drug Research. 27 (1): 55–61.
doi:
10.3109/13880208909053938.