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 methyl (2S,3aS)-2-methyl-3a,4,5,7-tetrahydro-3H-[1,2]oxazolo[2,3-c][1,3]oxazine-2-carboxylate ?
user
C9H15NO4
assistant