[{"from": "human", "value": "Provide a description of this molecule. [C][C][=Branch1][C][=O][N][Branch1][#Branch1][C][=Branch1][C][=O][N][C][O][C][=Branch1][C][=O][N][C]"}, {"from": "gpt", "value": "The molecule is an agent derived from acetohydroxamic acid with potential antineoplastic activity.  Caracemide inhibits ribonuclease reductase, resulting in decreased DNA synthesis and tumor growth; it also inhibits acetylcholinesterase.  In vivo, caracemide contributes to the formation of the neurotoxin methyl isocyanate; this effect, along with the agent's acetylcholinesterase activity, may be responsible for the severe central nervous system toxicity observed in clinical trials. (NCI04)"}]