You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (5aS,8aS)-5-methyl-7-(2-methyl-7-oxo-1H-pyrazolo[1,5-a]pyrimidine-6-carbonyl)-2,3,5a,6,8,8a-hexahydropyrrolo[3,4-b][1,4]oxazepin-4-one into its molecular formula.
user
C16H19N5O4
assistant