You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name [(2R)-1-[[4-(3,4-difluorophenyl)-1,3-thiazol-2-yl]amino]-1-oxopropan-2-yl] 3-phenylsulfanylpropanoate ?
user
C21H18F2N2O3S2
assistant