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 N-(6-amino-1-butyl-2,4-dioxopyrimidin-5-yl)-2,3-dimethyl-N-(2-methylpropyl)benzamide using the IUPAC nomenclature.
user
C21H30N4O3
assistant