You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named [(3aR,7aS,8aR)-2,3,3a,5,6,7,8,8a-octahydro-1H-cyclopenta[b]pyrrolizin-7a-yl]methanethiol is given. What is its corresponding molecular formula?
user
C11H19NS
assistant