You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-chloro-4-(2,5-dimethylpyridin-4-yl)-5-methoxypyridine;5-chloro-2-(2-methylbutyl)pyridine;N-(5-methyl-1,3,4-thiadiazol-2-yl)formamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H32Cl2N6O2S
assistant