The isolation and properties of the monoglucuronides of stilboestrol, hexoestrol and dienoestrol

Identification of drug glucuronides in human urine by RP-HPLC after derivatization

A method for the identification of four types of drug glucuronides in human urine is presented. The approach involves solid-phase extraction (C18 columns) from acidified human urine and subsequent methylation and acetylation of the extracted drug glucuronides to triacetyl methyl derivatives. These derivatives were identified by RP-HPLC by comparison with synthesized authentic reference compounds. The scope of the method was demonstrated by identification of glucuronides formed by metabolism of clofibrate, phenazone, disulfiram and sulfamethoxazole in urine samples of two male volunteers.

INHIBITION OF14C-ESTRONE METABOLISM IN RAT LIVER MICROSOMES BY 2-HYDROXYESTROGENS AND RELATED COMPOUNDS

Inhibition studies with compounds having structural features in common with the natural estrogens have shown that 2-hydroxyestrone and 2-hydroxyestradiol are potent inhibitors of the rat liver microsomal system, which converts estrone to water-soluble protein-bound products. Simple phenols and naphthols hydroxylated in the ortho and para positions were also found to be good inhibitors, but the corresponding meta-hydroxylated compounds, as well as various anthraquinones and estrogens substituted in the 6, 10, or 16 positions, were inactive in this respect. The synthetic estrogen, hexestrol, lost its inhibitory activity on conversion to dihydroxy hexestrol, a nonestrogenic analogue. The type of inhibition produced by 2-hydroxyestrone, equilenin, diethylstilbestrol, and menadione has been determined by the Lineweaver–Burk method and shown to be competitive for the first three of these compounds.