You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[4-(2-chlorophenyl)piperazin-1-yl]methyl]-2-[4-(2-ethylhexanoyl)-1,4-diazepan-1-yl]-1H-pyrimidin-6-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H41ClN6O2
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