the role of parathyroid hormone ( pth ) and 1 , 25-dihydroxy-cholecalciferol ( 1,25- ( oh ) 2d3 ) in modulation of intestinal ca absorption was studied in rats , using disodium ethane-1-hydroxy-1,1-diphosphonate ( ehdp ) , which is known to reduce 1,25- ( oh ) 2d3 formation .
C0012544
diphosphonate
C0086268
ehdp