You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-[7,7-dimethyl-4-(3-methylmorpholin-4-yl)-6,6-dioxo-5H-thieno[3,4-d]pyrimidin-2-yl]phenyl]-3-ethylurea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H29N5O4S
assistant