1 B08 (1-hydroxy-1-phosphono-2-[1,1';3',1'']terphenyl-3-yl-ethyl)-phosphonic acid 1.000 2 B29 [2-(3-dibenzofuran-4-yl-phenyl)-1-hydroxy-1-phosphono-ethyl]-phosphonic acid 0.967 3 B28 (1-hydroxy-1-phosphono-2-[1,1';4',1'']terphenyl-3-yl-ethyl)-phosphonic acid 0.812