You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Please write the molecular formula of the molecule 9-chloro-2'-(4-chlorophenyl)-5'-methylspiro[1,2,3,4,4a,6-hexahydrobenzo[c]quinolizine-5,4'-pyrazole]-3'-one .
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C22H21Cl2N3O
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