Steroids excreted in urine by neonates with 21-hydroxylase deficiency: Characterization, using GC–MS and GC–MS/MS, of the D-ring and side chain structure of pregnanes and pregnenes
作者:Sofia Christakoudi、David A. Cowan、Norman F. Taylor
DOI:10.1016/j.steroids.2009.09.011
日期:2010.1
conditions, were used together to determine the structure of the D-ring and the sidechain of 20-oxo and 20-hydroxy pregnane(ene)s without oxo groups on the A-, B-, and C-ring. All possible combinations of D-ring and sidechain configuration were considered. Most fragmentations could be interpreted as partial or complete D-ring cleavages with loss of the sidechain, aided by comparison with spectra of deuterated