You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-ethyl-2-[(2-imidazol-1-ylphenyl)methyl]-3-[[2-(4-methylphenyl)oxan-3-yl]methyl]guanidine by IUPAC nomenclature, provide its molecular formula.
user
C26H33N5O
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