User: I want to know more about the chemical with SMILES O=C([O-])C[NH+](CC[NH+](CC(=O)[O-])CC(=O)[O-])CC[NH+](CC(=O)[O-])CC(=O)[O-].[Ca+2].[Na+].[Na+].[Na+].
Assistant: Sure, what is your question?
User: Please describe this drug.
Assistant: The answer is An iron chelating agent with properties like EDETIC ACID. DTPA has also been used as a chelator for other metals, such as plutonium.
User: I want to know more 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#}
O=C([O-])C[NH+](CC[NH+](CC(=O)[O-])CC(=O)[O-])CC[NH+](CC(=O)[O-])CC(=O)[O-].[Ca+2].[Na+].[Na+].[Na+]
C(C[NH+](CC(=O)[O-])CC(=O)[O-])[NH+](CC[NH+](CC(=O)[O-])CC(=O)[O-])CC(=O)[O-].[Na+].[Na+].[Na+].[Ca+2]
calcium;trisodium;2-[bis[2-[bis(carboxylatomethyl)azaniumyl]ethyl]azaniumyl]acetate
Please describe this drug.