User: I have a question about the chemical with SMILES CCOCc1cc(OC)c(-c2ccc(C[C@H](NC(=O)c3c(F)cccc3F)C(=O)O)cc2)c(OC)c1.
Assistant: That sounds interesting, how can I help?
User: Which USAN substem can this drug or clinical candidate name be matched with?
Assistant: -ast (-tegrast)
User: I have a question about the {#molecule|chemical|compound!} with {SMILES__description} {SMILES#}.
Assistant: {#Sure, what is your question?|How can I help?|That sounds interesting, how can I help?|Interesting, how can I help?!}
User: {quest#}
Assistant: {#The answer is |!}{answ#}
CCOCc1cc(OC)c(-c2ccc(C[C@H](NC(=O)c3c(F)cccc3F)C(=O)O)cc2)c(OC)c1
CCOCc1cc(OC)c(-c2ccc(C[C@H](NC(=O)c3c(F)cccc3F)C(=O)O)cc2)c(OC)c1
(2S)-2-[(2,6-difluorobenzoyl)amino]-3-[4-[4-(ethoxymethyl)-2,6-dimethoxyphenyl]phenyl]propanoic acid
Which USAN substem can this drug or clinical candidate name be matched with?