You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (6R)-2-methyl-N-[(3-methyl-1-benzofuran-2-yl)methyl]-3-oxo-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyridine-6-carboxamide ?
user
C18H20N4O3
assistant