You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[3-(4-chlorophenyl)-1-[4-methyl-4-(3-methylphenyl)-2-oxopentyl]-5-oxo-1,2,4-triazol-4-yl]methyl]benzonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H27ClN4O2
assistant