tetraethyl (2-methoxyethane-1,1-diyl)bis(phosphonate)

diethyl (+/-)-4,4-bis(diethoxyphosphoryl)-5-pentylpyrrolidine-2,2-dicarboxylate

tetraethyl (3-nitrobutane-1,1-diyl)bisphosphonate

diethyl (+/-)-4,4-bis(diethoxyphosphoryl)-5-phenylpyrrolidine-2,2-dicarboxylate

[5-[2-(bis-{2-[5,5-bis-(diethoxy-phosphoryl)-pentylamino]-ethyl}-amino)-ethylamino]-1-(diethoxy-phosphoryl)-pentyl]-phosphonic acid diethyl ester

tetraethyl (2-methyl-3-phenylisoxazolidine-5,5-diyl)bis(phosphonate)

diethyl (+/-)-4,4-bis(diethoxyphosphoryl)-5-(4-methoxyphenyl)pyrrolidine-2,2-dicarboxylate

tetraethyl [2-(1H-benzo[d][1,2,3]triazol-1-yl)ethane-1,1-diyl]bisphosphonate

tetraethyl {1-[2,2-bis(diethoxyphosphoryl)ethyl]-4,5-dihydro-1H-1,2,3-triazole-4,4-diyl}bisphosphonate

tetraethyl (1-(2-(4-phenoxyphenoxy)ethyl)-4,5-dihydro-1H-1,2,3-triazole-4,4-diyl)bis(phosphonate)

tetraethyl 2-benzyl-3-o-chloro-phenyl-isoxazolidine-5,5-diyl-bisphosphonate

tetraethyl (17β (3-hydroxyoestra-1,3,5(10)-trienyl)oxycarbonyl) (ethoxycarbonyl) propylene bisphosphonate

tetraethyl (3-butyn-1-ylidene)-1,1-bisphosphonate

tetraethyl (17β (3-benzyloxyoestra-1,3,5(10)-trienyl)oxycarbonyl) (ethoxycarbonyl) propylene bisphosphonate

[2-{2-[2,2-Bis-(diethoxy-phosphoryl)-ethylamino]-ethylamino}-1-(diethoxy-phosphoryl)-ethyl]-phosphonic acid diethyl ester

tetraethyl (3-methyl-4,5-dihydroisoxazole-5,5-diyl)bisphosphonate

tetraethyl (5-oxopentylidene)bisphosphonate

diethyl 2-[2,2-bis(diethoxyphosphoryl)ethyl]propanedioate

tetraethyl (4-(1,3-dioxolan-2-yl)butylidene)bisphosphonate