You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as [2-[(3-cyano-5,6-dihydro-4H-cyclopenta[b]thiophen-2-yl)amino]-2-oxoethyl]-cyclopropyl-[(4-fluorophenyl)methyl]azanium using the IUPAC nomenclature.
user
C20H21FN3OS+
assistant