You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[(5S)-3-(2-chlorophenyl)-4,5-dihydro-1,2-oxazol-5-yl]methyl]-N-[(3-methoxyphenyl)methyl]-3-methylbutanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H27ClN2O3
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