You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[[5-(3,4-dimethylphenyl)-1,3,4-oxadiazol-2-yl]sulfanyl]-N-[(1R)-1-thiophen-2-ylethyl]acetamide into molecular formula.
user
C18H19N3O2S2
assistant