You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[[4-(3,4-difluorophenyl)-5-propyl-1,2,4-triazol-3-yl]sulfanyl]acetic acid by IUPAC nomenclature, provide its molecular formula.
user
C13H13F2N3O2S
assistant