You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-chlorophenyl)-2-[[4-(4-methoxyphenyl)-5-phenyl-1,2,4-triazol-3-yl]sulfanyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H19ClN4O2S
assistant