You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(3R,9aS)-4-oxo-1,6,7,8,9,9a-hexahydropyrido[2,1-c][1,4]oxazin-3-yl]-N-[4-(6-methyl-1,3-benzothiazol-2-yl)phenyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H25N3O3S
assistant