You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (4aR,8aS)-6-(1-benzothiophen-2-ylmethyl)-2,3,4,4a,5,7,8,8a-octahydro-1H-1,6-naphthyridine .
user
C17H22N2S
assistant