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 (2R)-2-[7-chloro-3-(3-methoxyphenyl)-2,4-dioxoquinazolin-1-yl]-N-[(1R)-1-phenylethyl]butanamide .
user
C27H26ClN3O4
assistant