"6-Quinoxalinecarboxylic acid, 2,3-bis(bromomethyl)- "
"6-Quinoxalinecarboxylic acid, 2,3-bis(bromomethyl)-"
"6-Quinoxalinecarboxylic acid, 2,3-bis(bromomethyl)-"
"6-Quinoxalinecarboxylic acid, 2,3-bis(bromomethyl)-"
"6-Quinoxalinecarboxylic acid, 2,3-bis(bromomethyl)-"
"6-Quinoxalinecarboxylic acid, 2,3-bis(bromomethyl)-"
"6-Quinoxalinecarboxylic acid, 2,3-bis(bromomethyl)-"