@article{ParrZappBeckeretal.2007, author = {Maria K. Parr and Josef Zapp and Michael Becker and Georg Opfermann and Ulrike Bartz and Wilhelm Schaenzer}, title = {Steroidal isomers with uniform mass spectra of their per-TMS derivatives: Synthesis of 17-hydroxyandrostan-3-ones, androst-1-, and -4-ene-3,17-diols}, series = {Steroids}, volume = {72}, number = {6-7}, publisher = {Elsevier}, issn = {0039-128X}, doi = {10.1016/j.steroids.2007.03.006}, pages = {545 -- 551}, year = {2007}, language = {en} }