You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 1-[(4aS,7aR)-3,4a,5,6,7,7a-hexahydro-2H-cyclopenta[b][1,4]oxazin-4-yl]-2-[4-(tetrazol-1-yl)phenyl]ethanone is given. What is its corresponding molecular formula?
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C16H19N5O2
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