You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (7S,9aR)-2-[(3-chlorophenyl)methyl]-7-propyl-1,3,4,7,8,9a-hexahydropyrazino[1,2-a]pyrazine-6,9-dione ?
user
C17H22ClN3O2
assistant