Task: Please answer the following question about the molecule with SMILES O=C(Nc1ccc(Cl)c(S(=O)(=O)N2CCNCC2)c1O)Nc1cccc(F)c1Cl.
Question: Which USAN substem can this drug or clinical candidate name be matched with?
Answer: -rixin
Task: Please answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
O=C(Nc1ccc(Cl)c(S(=O)(=O)N2CCNCC2)c1O)Nc1cccc(F)c1Cl
O=C(Nc1ccc(Cl)c(S(=O)(=O)N2CCNCC2)c1O)Nc1cccc(F)c1Cl
1-(2-chloro-3-fluorophenyl)-3-(4-chloro-2-hydroxy-3-piperazin-1-ylsulfonylphenyl)urea
Which USAN substem can this drug or clinical candidate name be matched with?
-rixin