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 3-[4-[2-(diethylamino)ethoxy]-3-methoxyphenyl]-6-[4-(iodomethyl)phenyl]thieno[3,2-d]pyrimidin-4-one ?
user
C26H28IN3O3S
assistant