You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [7-cyclopentyl-2-[[5-(4-methylpiperazin-1-yl)pyridin-2-yl]amino]thieno[3,2-d]pyrimidin-6-yl]-(3-methoxyazetidin-1-yl)methanone into molecular formula.
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C26H33N7O2S
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