You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4aR,6S,7R,8R,8aR)-7-azido-6-ethylsulfanyl-8-fluoro-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine into its molecular formula.
user
C15H18FN3O3S
assistant