131426-29-4 2-Quinoxalinepropanoic acid, 3,4-dihydro-6,7-dimethoxy-4-methyl-3-oxo-, hydrazide 3,4-Dihydro-6,7-dimethoxy-4-methyl-3-oxo-2-quinoxalinepropanoic acid hydrazide 6,7-Dimethoxy-1-methyl-2(1H)-quinoxalinone-3-proprionylcarboxylic acid hydrazide 6,7-Dmeo-mqpch Dmeq-hydrazide