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-chloro-6-[7-cyclopropyl-1-(5-methylpyrimidin-2-yl)indol-5-yl]-7,8-dihydro-5H-pyrimido[5,4-f][1,4]oxazepin-5-ol ?
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C23H21ClN6O2
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