You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[2-(ethylamino)propyl]-3,6,7,8,9,9a-hexahydropyrido[1,2-a]pyrazine-1,4-dione into its molecular formula.
user
C13H23N3O2
assistant