Abstract
The authors synthesized 3,4-dihydro-3-keto-6,7-dimethylquinoxaline-2-carbonamide, 3,4-dihydro-3-keto-6,7-dimethylquinoxaline-2-carbohydrazide, 3,4-dihydro-3-keto-6,7-dimethyl-2-quinoxaline-carboxyureide, 4,6,7-trimethyl-3,4-dihydro-3-oxo-2-quinoxaline-carboxyureide, 6,7-dimethyl-3,4-dihydro-3-oxo-4-D-ribityl-2-quinoxaline-carboxyureide as the allied compounds of the decomposition products of lumichrome-keto acid, and studied the chemical and physical properties of these compounds and the derivatives of their carboxyureides.
