You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 1-(azepan-1-yl)-2-[3-(3-thiophen-2-yl-1,2,4-oxadiazol-5-yl)azetidin-1-yl]ethanone ?
user
C17H22N4O2S
assistant