You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as tert-butyl N-[4-(4-carbamoyl-5-phenyl-1H-pyrrol-2-yl)pyrimidin-2-yl]-N-methylcarbamate using the IUPAC nomenclature.
user
C21H23N5O3
assistant