You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(4-propan-2-yl-1,2,4-triazol-3-yl)methyl]-2,3,3a,4,5,6,7,7a-octahydro-1H-indole-2-carboxamide into its molecular formula.
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C15H25N5O
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