You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3,4-dimethoxyphenyl)-3-[4-(4-oxo-2-phenylquinazolin-3-yl)phenyl]-1,3-thiazolidin-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H25N3O4S
assistant