Using O=S1(=O)N=CC=CN1, COc1cc2ncnc(N3CCC(CCBr)CC3)c2cc1OC to produce COc1cc2ncnc(N3CCC(CCN4C=CC=NS4(=O)=O)CC3)c2cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.