You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3,3-dimethyl-2,4,4a,5,6,7,8,9,10,11,12,13,14,14a-tetradecahydrocyclododeca[b][1,4]oxazine by IUPAC nomenclature, provide its molecular formula.
user
C16H31NO
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