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 [2-[[(6R)-3-cyano-6-methyl-4,5,6,7-tetrahydro-1-benzothiophen-2-yl]amino]-2-oxoethyl] pyridine-2-carboxylate .
user
C18H17N3O3S
assistant