You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-cyclopropyl-2-[4-oxo-8-(2-phenoxyacetyl)-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H30N4O4
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