tetra{2-[bis(2-phenethyl)phosphorothioyl]ethoxy}neopentane
tetra{2-[bis(2-phenethyl)phosphanyl]ethoxy}neopentane
tetra(2-{bis[2-(4-tert-butyl)phenethyl]phosphoroselenoyl}ethoxy)neopentane
tetra{2-[bis(2-phenethyl)phosphoroselenoyl]ethoxy}neopentane
tetra(2-{bis[2-(4-tert-butyl)phenethyl]phosphorotioyl}ethoxy)neopentane