You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-(4-methoxyphenyl)-2-[[(2R)-2-(methylamino)propanoyl]amino]-N-[1-[(2R)-2-methyloxiran-2-yl]-1-oxo-3-phenylpropan-2-yl]propanamide by IUPAC nomenclature, provide its molecular formula.
user
C26H33N3O5
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