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 4-[(2-chloro-5-oxo-6,7-dihydrothieno[3,2-d]pyrimidin-4-yl)amino]-N,N-dimethylbutanamide;ethane ?
user
C14H23ClN4O2S
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