Betanin
IUPAC 名称
(1E)-1-{2-[(4E)-2,6-dicarboxy-1,2,3,4-tetrahydropyridin-4-ylidene]ethylidene}-6-hydroxy-5-{[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-2,3-dihydro-1H-1λ⁵-indol-1-ylium-2-carboxylate
描述
Red pigment from beetroot, Beta vulgaris variety rubra and other Centrospermae. It is used as a food dye
Betanin is a betalain pigment, together with isobetanin, probetanin, and neobetanin. Other pigments contained in beet are indicaxanthin and vulgaxanthins.; Betanin, or Beetroot Red, is a red glycosidic food dye obtained from beets; its aglycone, obtained by hydrolyzing away the glucose molecule, is betanidin. As a food additive, its E number is E162. Betanin degrades when subjected to light, heat, and oxygen; therefore, it is used in frozen products, products with short shelf life, or products sold in dry state. Betanin can survive pasteurization when in products with high sugar content. Its sensitivity to oxygen is highest in products with high content of water and/or containing metal cations (eg. iron and copper); antioxidants like ascorbic acid and sequestrants can slow this process down, together with suitable packaging. In dry form betanin is stable in presence of oxygen. Betanin is found in many foods, some of which are pepper (c. frutescens), parsley, swamp cabbage, and pigeon pea.
异构
OCC1OC(OC2=C(O)C=C3C(CC(C([O-])=O)\[N+]3=C/C=C3\CC(NC(=C3)C(O)=O)C(O)=O)=C2)C(O)C(O)C1O
InChI标识符
InChI=1S/C24H26N2O13/c27-8-17-18(29)19(30)20(31)24(39-17)38-16-6-10-5-14(23(36)37)26(13(10)7-15(16)28)2-1-9-3-11(21(32)33)25-12(4-9)22(34)35/h1-3,6-7,12,14,17-20,24,27,29-31H,4-5,8H2,(H4,28,32,33,34,35,36,37)
键
DHHFDKNIEVKVKS-UHFFFAOYSA-N