Xu, Xia <br/><br/>
Measuring seven endogenous ketolic estrogens simultaneously in human urine by high-performance liquid chromatography-mass spectrometry.  [electronic resource] 

 -  Analytical chemistry  Oct 2004 
 - 5829-36 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0003-2700 
<br/><br/><label>Standard No.: </label>10.1021/ac049405i  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Chromatography, High Pressure Liquid--methods<br/>Estrogens--chemistry<br/>Ether--chemistry<br/>Female<br/>Humans<br/>Hydrolysis<br/>Hydroxylation<br/>Ketones--chemistry<br/>Methylation<br/>Middle Aged<br/>Molecular Structure<br/>Postmenopause--urine<br/>Premenopause--urine<br/>Spectrometry, Mass, Electrospray Ionization--methods