You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-(1,3,4,5,7,8,9,9a-octahydropyrrolo[1,2-a][1,4]diazepin-2-yl)-1,3-oxazole-4-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H21N3O3
assistant