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-(3-chlorophenyl)-1-(6-methoxypyridazin-3-yl)-3-methyl-5,7-dihydro-4H-pyrazolo[3,4-b]pyridin-6-one ?
user
C18H16ClN5O2
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