Using O=Cc1cnc(N2CCOCC2)nc1, COC(=O)c1cccc(C[P+](c2ccccc2)(c2ccccc2)c2ccccc2)c1 to produce COC(=O)c1cccc(C=Cc2cnc(N3CCOCC3)nc2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.