User: I have a question about the molecule with SMILES C[N+](C)(CCOc1ccccc1)Cc1ccccc1.O=C([O-])c1cc2ccccc2cc1O.
Assistant: That sounds interesting, how can I help?
User: What is the definition of this compound's USAN stem?
Assistant: quaternary ammonium derivatives
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#}
C[N+](C)(CCOc1ccccc1)Cc1ccccc1.O=C([O-])c1cc2ccccc2cc1O
C[N+](C)(CCOc1ccccc1)Cc1ccccc1.O=C([O-])c1cc2ccccc2cc1O
dimethyl-(2-phenoxyethyl)-(phenylmethyl)azanium;3-oxidanylnaphthalene-2-carboxylate
What is the definition of this compound's USAN stem?