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

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

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

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

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