You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[3-[2-tert-butyl-5-(thiophen-2-ylmethyl)-1,2,4-triazol-3-yl]piperidin-1-yl]acetamide into molecular formula.
user
C18H27N5OS
assistant