You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (2S)-2-[(4-cyclopropyl-5-thiophen-2-yl-1,2,4-triazol-3-yl)sulfanyl]-2-phenylacetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19N3O2S2
assistant