You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 8a-(2,4-difluorophenyl)-6-(1,3-oxazol-2-yl)-4a,5,6,8-tetrahydro-4H-pyrano[3,4-d][1,3]thiazin-2-amine into its molecular formula.
user
C16H15F2N3O2S
assistant