You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5R)-5-tert-butyl-N-methyl-N-[(5-phenyl-1,3,4-oxadiazol-2-yl)methyl]-4,5,6,7-tetrahydro-1,2-benzoxazole-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H26N4O3
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