as well as bromosulphophthalein and dehydroepiandrosterone sulphate , a number of strucurally similar organic anions including 2-hydroxyoestradiol-glutathione oestrone glycyronide , n-methyl-4-aminoazobenzene-glutathione and several bile acids , were able to displace oestrone sulphate from ligandin in a manner consistent with competition at a single binding site .
C0014942
oestrone
C0059668
oestrone sulphate