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-(2,3,3a,4,5,6,7,7a-octahydro-1H-indol-2-ylmethyl)-2-methoxy-N-(2-methoxyethyl)ethanamine by IUPAC nomenclature, provide its molecular formula.
user
C15H30N2O2
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