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 2-[[5-(4-fluorophenyl)-1,3,4-oxadiazol-2-yl]sulfanyl]-N-[[(1S,2R)-2-methylcyclohexyl]carbamoyl]acetamide .
user
C18H21FN4O3S
assistant