Using CCOCc1nc2c(N)nc3cc(OCCCNC(=O)OC(C)(C)C)ccc3c2n1NC(C)C to produce CCOCc1nc2c(N)nc3cc(OCCCN)ccc3c2n1NC(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.