User: I want to know more about the compound with SMILES O=[N+]([O-])OCC(CO[N+](=O)[O-])(CO[N+](=O)[O-])CO[N+](=O)[O-].
Assistant: Interesting, how can I help?
User: What is the polar surface area (PSA) value of this compound?
Assistant: The answer is 209.48
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=[N+]([O-])OCC(CO[N+](=O)[O-])(CO[N+](=O)[O-])CO[N+](=O)[O-]
O=[N+]([O-])OCC(CO[N+](=O)[O-])(CO[N+](=O)[O-])CO[N+](=O)[O-]
[3-nitrooxy-2,2-bis(nitrooxymethyl)propyl]nitrate
What is the polar surface area (PSA) value of this compound?
209.48