Using Nc1ccc2c(c1)CCC1(C2)NC(=O)NC1=O, O=C=Nc1cccc2ccccc12 to produce O=C(Nc1ccc2c(c1)CCC1(C2)NC(=O)NC1=O)Nc1cccc2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.