You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[3-(1,3-benzoxazol-2-yl)piperidin-1-yl]-3-(5-thiophen-3-yl-1,3,4-oxadiazol-2-yl)propan-1-one into its molecular formula.
user
C21H20N4O3S
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