Using COCCBr, COc1cc2c(Nc3ccc(C)c(OC(C)=O)c3)ncnc2cc1O to produce COCCOc1cc2ncnc(Nc3ccc(C)c(OC(C)=O)c3)c2cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.