You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-(2,3,4a,5,6,7,8,8a-octahydrobenzo[b][1,4]oxazin-4-yl)-2-[4-(5-butyl-1,2,4-oxadiazol-3-yl)phenoxy]ethanone into its molecular formula.
user
C22H29N3O4
assistant