You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-(3-cyano-5,6-dihydro-4H-cyclopenta[b]thiophen-2-yl)-2-[[(2S,3R)-3-pyrazol-1-ylbutan-2-yl]amino]acetamide ?
user
C17H21N5OS
assistant