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system
Provide the molecular formula for the IUPAC named substance 3-O-ethyl 5-O-(4-nitrooxybutyl) 2,6-dimethyl-4-(1-methyl-5-nitroimidazol-2-yl)-1,4-dihydropyridine-3,5-dicarboxylate .
user
C19H25N5O9
assistant