You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(2,4-dimethylphenyl)-2-[[5-(4-methylphenyl)-1,3,4-oxadiazol-2-yl]sulfanyl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C19H19N3O2S
assistant