Using COC(=O)Nc1nc2c(OC)ccc(C3=CCN(C(=O)OC(C)(C)C)CC3)c2s1 to produce COC(=O)Nc1nc2c(OC)ccc(C3=CCNCC3)c2s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.