Using COC(OC)c1nc2c(cc1C1CCN(C(=O)OC(C)(C)C)CC1)CCCN2 to produce COC(OC)c1nc2c(cc1C1CCNCC1)CCCN2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.