983-81-3 NSC132587 Phosphine, 1,2-ethenediylbis[diphenyl-, (E)- Phosphine, vinylenebis[diphenyl-, (E)- Phosphine, vinylenebis[diphenyl-, trans- trans-1,2-Bis(diphenylphosphinyl)ethylene trans-Vinylenebis[diphenylphosphine]