You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[2-[[4-(3-fluoro-4-methoxyphenyl)-1,3-thiazol-2-yl]amino]-2-oxoethyl]sulfanyl-N-(4-fluorophenyl)acetamide .
user
C20H17F2N3O3S2
assistant