You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 5-chloro-N-[(1S)-1-(6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepin-3-yl)ethyl]thiophene-2-carboxamide ?
user
C14H17ClN4OS
assistant