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 (2'R,4'S,4'aS)-2',4'-dimethyl-2,4,6-trioxospiro[1,3-diazinane-5,5'-2,4,4a,6-tetrahydro-1H-[1,4]oxazino[4,3-a]quinoline]-9'-carboxylate ?
user
C19H21N3O6
assistant