Using C=C(CO)COC(=O)CCCCCBr, CCCCCCCCCCCCCN=C=O to produce C=C(COC(=O)CCCCCBr)COC(=O)NCCCCCCCCCCCCC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.