You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [(7S,9aS)-1,3,4,6,7,8,9,9a-octahydropyrazino[2,1-c][1,4]oxazin-7-yl]methoxy-tert-butyl-dimethylsilane by IUPAC nomenclature, provide its molecular formula.
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C14H30N2O2Si
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