You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (2R)-N-[(1R)-2-methyl-1-(3-methyl-1-benzofuran-2-yl)propyl]-2-(1,2,4-triazol-1-yl)propanamide ?
user
C18H22N4O2
assistant