Using CCC1(CCC(=O)OC)C(CCC(=O)OC)CCN2CCc3c([nH]c4ccccc34)C21 to produce CCC1(CCC(=O)OC)CCCN2CCc3c([nH]c4ccccc34)C21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.