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 2-[2-chloro-4-[[[(7Z)-6-imino-7-(3-iminobutan-2-ylidene)thieno[3,2-d]pyrimidin-4-yl]amino]methyl]phenyl]propan-2-ol .
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C20H22ClN5OS
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