You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule [1-(4-acetyl-3,5-dimethyl-1H-pyrrol-2-yl)-1-oxopropan-2-yl] 4,5-dimethoxy-2-nitrobenzoate ?
user
C20H22N2O8
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