You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[(4R)-4-[(1R,3aR,4S,7aR)-7a-methyl-4-triethylsilyloxy-1,2,3,3a,4,5,6,7-octahydroinden-1-yl]pentyl]-N-cyclopropyl-methylboronamidic acid by IUPAC nomenclature, provide its molecular formula.
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C25H50BNO2Si
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