Quinic Acid

quinic acid

[′kwin·ik ′as·əd] (organic chemistry) C₆H₇(OH)₄COOH·H₂O Ether-insoluble, white crystals with acid taste; melts at 162°C; soluble in alcohol, water, and glacial acetic acid; used in medicine. Also known as chinic acid; kinic acid.

Quinic Acid

C₆H₇(OH)₄COOH, a monobasic hydroxy poly-carboxylic acid; an important intermediate product in the biosynthesis of aromatic compounds (flavonoids and phenol carboxylic acid) in higher plants and some microorganisms. Quinic acid is obtained in the form of colorless crystals, which dissolve readily in water. It has a melting point of 162°C. It is found primarily in peaches, pears, and coffee berries, as well as in the bark of the cinchona tree and the summer needles of pines. In both plants and microorganisms, it is formed from acyclic carbohydrates, namely, heptuloses. In higher plants, quinic acid is readily converted to shikimic acid, phenylalanine, and tyrosine. In bacteria, it usually does not participate in the biosynthesis of aromatic acids. Esters of quinic acid are often encountered in plants, for example, chlorogenic acid.

REFERENCES

Zaprometov, M. N. Osnovy biokhimii fenol’nykh soedinenii. Moscow, 1974.
Kretovich, V. L. Osnovy biokhimii rastenii, 5th ed. Moscow, 1971.

quinic acid

quin·ic ac·id

(kwin'ik as'id), l-quinic acid; the (-) isomer is an acid found in cinchona bark and elsewhere in plants; 5-dehydroquinic acid is an intermediate in the biosynthesis of l-phenylalanine, l-tyrosine, and l-tryptophan from carbohydrate precursors; quinic acid forms a γ-lactone on heating. Synonym(s): kinic acid

quinic acid

C₇H₁₂O₆, a crystalline acid present in some plants, including cinchona bark, and berries. CAS # 77-95-2See also: acid

单词	quinic acid
释义	quinic acid quinic acid (ˈkwɪnɪk) n (Biochemistry) a white crystalline soluble optically active carboxylic acid, found in cinchona bark, bilberries, coffee beans, and the leaves of certain other plants; 1,3,4,5-tetrahydroxycyclohexanecarboxylic acid. Formula: C6H7(OH)4COOH Translations Quinic Acid quinic acid [′kwin·ik ′as·əd] (organic chemistry) C₆H₇(OH)₄COOH·H₂O Ether-insoluble, white crystals with acid taste; melts at 162°C; soluble in alcohol, water, and glacial acetic acid; used in medicine. Also known as chinic acid; kinic acid. Quinic Acid C₆H₇(OH)₄COOH, a monobasic hydroxy poly-carboxylic acid; an important intermediate product in the biosynthesis of aromatic compounds (flavonoids and phenol carboxylic acid) in higher plants and some microorganisms. Quinic acid is obtained in the form of colorless crystals, which dissolve readily in water. It has a melting point of 162°C. It is found primarily in peaches, pears, and coffee berries, as well as in the bark of the cinchona tree and the summer needles of pines. In both plants and microorganisms, it is formed from acyclic carbohydrates, namely, heptuloses. In higher plants, quinic acid is readily converted to shikimic acid, phenylalanine, and tyrosine. In bacteria, it usually does not participate in the biosynthesis of aromatic acids. Esters of quinic acid are often encountered in plants, for example, chlorogenic acid. REFERENCES Zaprometov, M. N. Osnovy biokhimii fenol’nykh soedinenii. Moscow, 1974. Kretovich, V. L. Osnovy biokhimii rastenii, 5th ed. Moscow, 1971. quinic acid quin·ic ac·id (kwin'ik as'id), l-quinic acid; the (-) isomer is an acid found in cinchona bark and elsewhere in plants; 5-dehydroquinic acid is an intermediate in the biosynthesis of l-phenylalanine, l-tyrosine, and l-tryptophan from carbohydrate precursors; quinic acid forms a γ-lactone on heating. Synonym(s): kinic acid quinic acid C₇H₁₂O₆, a crystalline acid present in some plants, including cinchona bark, and berries. CAS # 77-95-2See also: acid ThesaurusSeeacid
随便看	high vapour pressure liquid high variable regions of the minicircle high variable system high variation mix holding my end up holding my ground holding no brief for holding, nominee holding nose holding note holding no terrors for holding off holding off from holding on holding one accountable holding one accountable for holding one at bay holding one back holding one for ransom holding one hostage holding one in contempt holding one's breath holding one's end up holding one to holding one up