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 5,6-dimethyl-3-[1-(oxolane-2-carbonyl)piperidin-4-yl]-2-propan-2-ylthieno[2,3-d]pyrimidin-4-one .
user
C21H29N3O3S
assistant