You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (5R)-5-(2,5-dimethoxyphenyl)-2-[(4-hydroxy-3-iodo-5-methoxyphenyl)methylidene]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H25IN2O7S
assistant