You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (E)-4-[[2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-phenylpropanoyl]amino]-5-phenylpent-2-enoic acid into molecular formula.
user
C25H30N2O5
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