You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (7S,9aR)-7-propan-2-yl-1,7,8,9a-tetrahydropyrazino[2,1-c][1,4]oxazine-6,9-dione ?
user
C10H14N2O3
assistant