You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[2-(N-methyl-4-nitroanilino)ethyl]-4-oxoimidazo[5,1-d][1,2,3,5]tetrazine-8-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H14N8O4
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