You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3-methyl-1-benzofuran-2-yl)-2-[[5-[[(2R)-oxolan-2-yl]methylamino]-1,3,4-thiadiazol-2-yl]sulfanyl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H19N3O3S2
assistant