1-Hydroxy-3-aminopropane 1,1-diphosphonate-Gd-dtpa 133019-01-9 Dtpa-1-hydroxy-3-aminopropane-1,1-diphosphonate Gadoliante(5-), (8,11,14-tris(carboxymethyl)-1,1,2-trihydroxy-6-oxo-2-phosphono-5,8,11,14-tetraaza-1-phosphahexadecan-16-oic acid 1-oxidato(8-)-N8,N11,N14,O6,O8,O11,O14,O16)-, pentahydrogen Gd-Dtpa-hpdp