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 [3-(3-methoxypyrazin-2-yl)oxypiperidin-1-yl]-(2-methyl-2,3-dihydro-1,4-benzodioxin-3-yl)methanone ?
user
C20H23N3O5
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