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 5-(3,4-dimethoxyphenyl)-2-[2-[2-(trifluoromethyl)phenyl]ethenyl]-3H-thieno[2,3-d]pyrimidin-4-one .
user
C23H17F3N2O3S
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