Using CCCn1c(=O)[nH]c(N)c(N)c1=O, O=C(O)C1CCCC1 to produce CCCn1c(=O)[nH]c(N)c(NC(=O)C2CCCC2)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.