Using BrCCCBr, CCCc1c(COc2ccc(Cc3nnn[nH]3)cc2)ccc(C(C)=O)c1O to produce CCCc1c(COc2ccc(Cc3nnn(CCCBr)n3)cc2)ccc(C(C)=O)c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.