You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[(dimethylamino)methyl]-N-[1-(5-methyl-1,3-thiazol-2-yl)ethyl]-5-phenylthieno[2,3-d]pyrimidin-4-amine is given. What is its corresponding molecular formula?
user
C21H23N5S2
assistant