Using CCOC(=O)c1c(C)nc2c(OCC3(c4ccccc4)CC3)cccn12 to produce Cc1nc2c(OCC3(c4ccccc4)CC3)cccn2c1CO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.