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Structures of macrocyclic bisphosphonates BPAMD, NO2APBP (2,2'-(7-(((2,2-diphosphonoethyl)(hydroxy)phosphoryl)methyl)-1,4,7-triazonane-1,4-diyl)diacetic acid) and DOTAZOL (2,2',2''-(10-(2-(2-(1-(2-hydroxy-2,2-diphosphonoethyl)-1H-imidazol-4-yl)ethylamino)-2-oxoethyl)-1,4,7,10-tetraazacyclododecane-1,4,7-triyl)triacetic acid).
