You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[2-[[2-[(2-amino-4-methylpentanoyl)amino]-3-carboxypropanoyl]amino]-3-phenylpropanoyl]amino]-4-methylpentanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H38N4O7
assistant