You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance cyclohexa-1,3-dien-1-ylmethyl N-[1-(5-carbamoyl-4-cyclopentylpyrimidin-2-yl)cyclopropyl]carbamate .
user
C21H26N4O3
assistant