You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-chloro-5-nitrophenyl)-2-[[4-(oxolan-2-ylmethyl)-5-propan-2-yl-1,2,4-triazol-3-yl]sulfanyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H22ClN5O4S
assistant