You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-methoxyethyl 6-ethyl-3-methyl-5-(3-nitrophenyl)-4,5-dihydropyridazine-4-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C17H21N3O5
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