Using O=CO, COc1ccc(N2CCNCC2)c2sc(NC(=O)c3ccc(C)s3)nc12 to produce COc1ccc(N2CCN(C)CC2)c2sc(NC(=O)c3ccc(C)s3)nc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.