You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-methyl-N-[2-(4-methyl-5-oxo-3-thiophen-2-yl-1,2,4-triazol-1-yl)ethyl]butanamide .
user
C14H20N4O2S
assistant