122575-21-7 153Sm-Edtmp Samarate(5)-153Sm, (((1,2-ethanediylbis(nitrilobis(methylene)))tetrakis(phosphonato))(8-)-N,N',O(P),O(P'),O(P''),O(P'''))-, pentahydrogen, (OC-6-21)- Samarium ethylenediaminetetramethylenephosphonate Samarium-153 lexidronam Samarium-153-edtmp Sm-Edtmp