P-[({4-[5-({2-[3,5-bis(trifluoromethyl)phenyl]-2-methylpropanoyl}(methyl)amino)-4-(2-methylphenyl)pyridin-2-yl]-1-methylpiperazin-1-ium-1-yl}methyl)oxy]-P-{[({[({4-[5-({2-[3,5-bis(trifluoromethyl)phenyl]-2-methylpropanoyl}(methyl)amino)-4-(2-methylphenyl)pyridin-2-yl]-1-methylpiperazin-1-ium-1-yl}methyl)oxy]oxido(oxo)-λ5-phosphanyl}oxy)methyl]oxy}phosphinate