20-Hydroxyimino-5 alpha-pregna-9(11),16-dien-3 beta-yl acetate and 17-oxo-5 alpha-androst-9(11)-en-3 beta-yl acetate

摘要

In the title compounds, C23H33NO3 and C21H30O3, respectively, the ester linkage in ring A is equatorial. In these steroids, the six-membered rings A and B have chair conformations, but ring C can be better described as a half-chair. The five-membered ring D adopts a 14 alpha -envelop conformation. The A/B, B/C and C/D ring junctions are trans. References: 16