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 1-[4-[[3-(4-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]piperazin-1-yl]-3-pyrrolidin-3-ylpropan-1-one;dihydrochloride .
user
C21H31Cl2N5O2
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