You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(10bR)-9-bromo-4'-phenyl-2-thiophen-2-ylspiro[1,10b-dihydropyrazolo[1,5-c][1,3]benzoxazine-5,1'-cyclohexane] is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H23BrN2OS
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