Structure of Carthamin

Abstract

The structure 6, 1-(2,6-diketo-3-glucosyl-3,4-dihydroxy-5-p-hydroxycinnamoyl)-cyclohex-4-enylidene-1′-(2′,3′,4′-trihydroxy-3′-glucosyl-5′-p-hydroxycinnamoyl-6′-keto)-cyclohexa-1′,4′-dienylmethane, was assigned for carthamin on the basis of its spectroscopic evidence and hydrolytic behavior.

Markers for Identification of Faded Safflower (Carthamus tinctoriusL.) Colorants by HPLC-PDA-MS - Ancient Fibres, Pigments, Paints and Cosmetics Derived from Antique Recipes

“…75140). the chemical structure was established in 1979 [16] (Figure 1), and two optical isomers were discovered thereafter [17]. in several publications the formula of carthamin is misrepresented such that the carbohydrate moieties are bound via oxygen bridges, but this is incorrect and does not correspond to mass spectrometric data.…”

Studies on the synthesis of safflomin-A, a yellow pigment in safflower petals: oxidation of 3-C-β-d-glucopyranosyl-5-methylphloroacetophenone

“…The following yellow and red pigments produced in Safflower (Carthamus tinctrious L.) petals have been reported: (1) a red pigment: carthamin; 1 (2) a yellow pigment: a carthamin precursor; 2 safflower yellow B; 3 safflomin-A 4a-c and -C; 5 tinctromine 6 and cartormin. 7 All these pigments contain a characteristic C-b-D D-glucopyranosylquinochalcone structure.…”

Structure of Precarthamin, a Biosynthetic Precursor of Carthamin

“…The structure has only recently been revealed because of the compound's instability, 5,6) the structural determination being independently accomplished by us and by J. Onodera et ai. 7,8) We now report a new isolation method and the structural elucidation of precarthamin (1).…”