113942-32-8 3-(2-Chloroethyl)-3,4-dihydro-4-oxoimidazo(5,1-a)-1,2,3,5-tetrazine-8-carboxylic acid 3-(2-Chloroethyl)-4-oxo-3H-imidazo(5,1-d)-1,2,3,5-tetrazine-8-carboxylic acid 3-Coitc Imidazo(5,1-a)-1,2,3,5-tetrazine-8-carboxylic acid, 3-(2-chloroethyl)-3,4-dihydro-4-oxo-