抄録
For isolating the reaction products in this coloration, an attempt was made to use 6-O-benzoylascorbic acid instead of ascorbic acid and a stable blue dye soluble in organic solvent was obtained. To elucidate the structure, this dye was examined by elemental analysis, molecular weight determination, infrared spectroscopy and fluorescent reaction with o-phenylenediamine. From the findings of these examinations, it was presumed that the dye had the chemical etructure of indophenine type in which 2 moles of pyrrole combined at α-position with carbonyl group at 3-position of 2 moles of 6-O-benzoyldehydroascorbic acid.
