You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(cyanomethyl)-2-[[5-cyclopropyl-4-(furan-2-ylmethyl)-1,2,4-triazol-3-yl]sulfanyl]-N-phenylacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H19N5O2S
assistant