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

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

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