You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(2R)-oxolan-2-yl]-[7-pyridin-3-yl-9-(2-thiophen-2-ylethoxy)-3,5-dihydro-2H-1,4-benzoxazepin-4-yl]methanone by IUPAC nomenclature, provide its molecular formula.
user
C25H26N2O4S
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