2-Ethyl 5-(4-nitrophenyl)methyl 4H,5H,6H,7H-pyrazolo[1,5-a]pyrazine-2,5-dicarboxylate2-Ethyl 5-(4-nitrophenyl)methyl 4H,5H,6H,7H-pyrazolo[1,5-a]pyrazine-2,5-dicarboxylate
