Using COC(OC)OC, COC(=O)c1ccc2c(c1)N(C(C)=O)CC2=O to produce COC(=O)c1ccc2c(OC)cn(C(C)=O)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.