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 2-[3-[[1-(3,4-dichlorophenyl)-2,4,6-trioxo-1,3-diazinan-5-ylidene]methyl]indol-1-yl]acetamide ?
user
C21H14Cl2N4O4
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