You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S)-4-(4-methoxybenzoyl)-8-(2-methylpropanoyl)-N-(pyridin-4-ylmethyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C26H32N4O5
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