You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 2-[[(4-benzyl-2,3,4a,5,7,7a-hexahydropyrrolo[3,4-b][1,4]oxazin-6-yl)-(ethylamino)methylidene]amino]-N-ethylacetamide using the IUPAC nomenclature.
user
C20H31N5O2
assistant