You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 8-(3,4-dichlorophenyl)-3-(ethylsulfonylmethyl)-4,7-dimethylpyrazolo[5,1-c][1,2,4]triazine .
user
C16H16Cl2N4O2S
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