... Steroids. Volume 2, Issue 4, October 1963, Pages 387–392. Cover image Cover image. Ring a aromatization of 5, 6-disubstituted 3-Keto-19-norsteroids and related compounds. ... J. Am. Chem. Soc., 78 (1956), p. 5662. 2. JP Ruelas, I. Iriarte, J. Kind, C. Djerassi; J. Org. ...