You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2,3-dimethylcyclohexyl)-2-[(5,6-diphenyl-1,2,4-triazin-3-yl)sulfanyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H28N4OS
assistant