User: I want to know more about the compound with SMILES O=C([O-])CN(CCN(CC(=O)[O-])CC(=O)[O-])CCN(CC(=O)[O-])CC(=O)[O-].[Ca+2].[Na+].[Na+].[Na+].
Assistant: Interesting, how can I help?
User: How many hydrogen bond donors does this compound have?
Assistant: 5
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-])CN(CCN(CC(=O)[O-])CC(=O)[O-])CCN(CC(=O)[O-])CC(=O)[O-].[Ca+2].[Na+].[Na+].[Na+]
O=C([O-])CN(CCN(CC(=O)[O-])CC(=O)[O-])CCN(CC(=O)[O-])CC(=O)[O-].[Ca+2].[Na+].[Na+].[Na+]
calcium;trisodium;2-[bis[2-[bis(carboxylatomethyl)amino]ethyl]amino]acetate
How many hydrogen bond donors does this compound have?