Using O=C([O-])[O-], O=c1[nH]c(=O)n(C2CCCCC2)c2nocc12 to produce Cn1c(=O)c2conc2n(C2CCCCC2)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.