Using c1ccc(P(c2ccccc2)c2ccccc2)cc1, CC(C)(C)OC(=O)N=C(NC(=O)OC(C)(C)C)NC(=O)OC(C)(C)C to produce CN(C(=O)OC(C)(C)C)C(=NC(=O)OC(C)(C)C)NC(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.