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 1-(cyclobutylmethyl)-3-(2-methyl-1-benzofuran-5-yl)-1-[[(2R)-oxolan-2-yl]methyl]urea .
user
C20H26N2O3
assistant