Using COc1ccc2c(c1OC)CCC1CN(C(=O)CCc3ccc(N)cc3)CC21 to produce COc1ccc2c(c1OC)CCC1CN(CCCc3ccc(N)cc3)CC21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.