You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-[(5,7-dimethyl-2-oxo-1H-pyrazolo[1,5-a]pyrimidin-6-yl)methyl]-2-propan-2-yloxane-3-carboxamide using the IUPAC nomenclature.
user
C18H26N4O3
assistant