You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3aR,8bR)-1-phenyl-3a,8b-dihydro-[1]benzothiolo[3,2-d][1,2]oxazole 4,4-dioxide is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H11NO3S
assistant