You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-(4-chloroimidazol-1-yl)-3-methoxyphenyl]-3-ethyl-6-methylsulfonyl-8-phenyl-4,5,7,8-tetrahydro-2H-pyrido[4,3-d]pyrimidine-2,4-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H32ClN7O3S
assistant