You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-(4-butan-2-ylphenyl)-2-[[4-(3,4-dichlorophenyl)-5-sulfanylidene-1,3,4-thiadiazol-2-yl]sulfanyl]acetamide .
user
C20H19Cl2N3OS3
assistant