You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (4S)-4-(2,6-dichlorophenyl)-6-methyl-N-(3-nitrophenyl)-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxamide .
user
C18H14Cl2N4O4
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