P,P′-(3-Amino-1-hydroxypropylidene)bis[phosphonic acid]40391-99-934 % similar (S)-2-Amino-2-methyl-4-phosphonobutanoic acid157381-42-534 % similar Phosphonoacetic acid4408-78-033 % similar Spermidine phosphate49721-50-832 % similar Alendronic acid66376-36-132 % similar Hexanediaminetetra(methylenephosphonic acid)23605-74-532 % similar 2-Amino-3-phosphonopropionic acid20263-06-331 % similar P,P',P'',P'''-(((Phosphonomethyl)imino)bis(6,1-hexanediylnitrilobis(methylene)))tetrakisphosphonic acid34690-00-131 % similar Benzylphosphonic acid6881-57-831 % similar