Luteic acid
IUPAC 名称
3,4,8,9,10-pentahydroxy-6-oxo-6H-benzo[c]chromene-1-carboxylic acid
描述
Luteic acid, also known as luteate, is a member of the class of compounds known as hydrolyzable tannins. Hydrolyzable tannins are tannins with a structure characterized by either of the following models. In model 1, the structure contains galloyl units (in some cases, shikimic acid units) are linked to diverse polyol carbohydrate-, catechin-, or triterpenoid units. In model 2, contains at least two galloyl units C-C coupled to each other, and do not contain a glycosidically linked catechin unit. Luteic acid is practically insoluble (in water) and a weakly acidic compound (based on its pKa). Luteic acid can be found in guava, which makes luteic acid a potential biomarker for the consumption of this food product. Luteic acid is a natural phenol found in numerous fruits. It is a monolactonized tergalloyl group. Maximilian Nierenstein showed in 1945 that luteic acid was a molecule present in the myrobalanitannin, a tannin found in the fruit of Terminalia chebula and is an intermediary compound in the synthesis of ellagic acid. It can form from hexahydroxydiphenic acid. It is also present in the structure of the tannins alnusiin and bicornin .
异构
OC(=O)C1=CC(O)=C(O)C2=C1C1=C(O)C(O)=C(O)C=C1C(=O)O2
InChI标识符
InChI=1S/C14H8O9/c15-5-2-4-7(11(19)9(5)17)8-3(13(20)21)1-6(16)10(18)12(8)23-14(4)22/h1-2,15-19H,(H,20,21)
键
FLZGFQFYDGHWLR-UHFFFAOYSA-N