You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5-methyl-2-phenylpyrazol-3-yl) 4-(2-amino-3-methylbutanoyl)-2-methylpiperazine-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H29N5O3
assistant