Using CCOC(=O)Cn1c2c(c3ccccc31)CN(C(=O)OC(C)(C)C)CC2 to produce CCOC(=O)Cn1c2c(c3ccccc31)CNCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.