You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please identify the SMILES representation of the molecule named (2R)-2-[[(1S)-1-(2,4-difluorophenyl)ethyl]amino]-N-(4-ethylphenyl)propanamide .
user
CCC1=CC=C(NC(=O)C(C)NC(C)C2=CC=C(F)C=C2F)C=C1
assistant