Using c1ccc(P(c2ccccc2)c2ccccc2)cc1, CCCCOC(=O)NS(=O)(=O)NCC(=O)OCC to produce CCCCOC(=O)N(C)S(=O)(=O)NCC(=O)OCC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.