Using O=c1[nH]c(-c2ccc(Cl)cc2Cl)cc2nc(C3CCNCC3)nn12, C=O to produce CN1CCC(c2nc3cc(-c4ccc(Cl)cc4Cl)[nH]c(=O)n3n2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.