Kinotannic acid
Names | |
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Other names Coccotannic acid kino-tannic acid | |
Identifiers | |
Properties | |
Chemical formula | C18H18O8[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references |
Chemical compound
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]
Properties
When dry distilled it yields pyrocatechine and protocatechinic acid.[5]
It is soluble in water. Solutions are precipitated by lead or copper salts.
Kinotannic acid is degraded by oxidation when exposed to air.
References
- ^ Pterocarpi Lignum - Red Sandal Wood. -The Wood Of Pterocarpus Santalinus. From Ceylon on chestofbooks.com
- ^ Pterocarpus on www.henriettes-herb.com
- ^ Dissert. Dorpat, 1884
- ^ Kino (U. S. P.)—Kino. on www.henriettes-herb.com
- ^ 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.
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Types of hydrolysable tannins
- Glucose
- Quinic acid
- Shikimic acid
gallic acid | Ellagic acid | Vanillic acid
- Ellagitannins
- Gallotannins
- 1,2-di-O-galloyl-3-O-digalloyl-4,6-O-(S)-hexa- hydroxydiphenoy-β-D-glucose
- 2,3-(S)-Hexahydroxydiphenoyl-D-glucose
- Alienanin B
- Alunusnin A
- Aromatinin A
- Balanophotannin D, E, F and G
- Burkinabin A, B and C
- Castavaloninic acid
- Cinchotannic acid
- Cocciferin D2
- Emblicanins (Emblicanin A and Emblicanin B)
- Euprostin A
- Flavogallonic acid
- Flavogallonic acid dilactone
- Heterophylliin D
- Helioscopin A (1,6-(S)-hexahydroxydiphenoyl-2,4-(R)-elaeocarpusinoyl-3-O-galloyl-β-D-glucose)
- Helioscopin B (1,3,6-tri-O-galloyl-2,4-(R)-elaeocarpusinoyl-β-D-glucose)
- Helioscopinin A (1,6-(S)-hexahydroxydiphenoyl-2,4-(S)-dehydrohexahydroxydiphenoyl-3-O-galloyl-β-D-glucose)
- Helioscopinin B (1,6-(S)-hexahydroxydiphenoyl-3-O-galloyl-β-D-glucose)
- Hipophaenin D
- Isostrictinin
- Kinotannic acid
- Platycaryanin A
- Rugosin C, D and F
- Squarrosanin A
- Strictinin
- Syzyginin A
- Tannic acid
- Tellimagrandin I
- Tercatin
- Tergallagin
- Vescalin
- Vescavaloneic acid/Castavaloneic acid
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