1,3-bis(2-naphthylmethyl)-(4α,5α,6β,7β)-hexahydro-5,6-(1-methylethylidene)bis(oxy)-2-phenoxy-4,7-bisbenzyl-1H-1,3,2-diazaphosphepine 2-oxide

1,3-bis(4-(tetrahydropyranyloxymethyl)benzyl)-(4α,5α,6β,7β)-hexahydro-5,6-(1-methylidene)bis(oxy)-2-phenoxy-4,7-bisbenzyl-1H-1,3,2-diazaphosphepine-2-oxide