1. R. Gardi, R. Vitali andP. P. Castelli, Tetrahedron Lett.27, 3203 (1966).
2. G. Briziarelli, Endocrinology81, 390 (1967).
3. Systematic name: 2, 3, 3a, 4, 5, 5a, 5b, 6, 7, 12, 12a, 12b-dodecahydro-5aα-fluoro-3β,5β-dihydroxy-3aβ,5bβ-dimethylbenzo[f,g]-cyclopent[a]anthracen-8(1H)-one 3-acetate.
4. G. H. Thomas andJ. Fried U.S. Patent No. 3,001,990 (September 26, 1961); Chem. Abstr.56, 2485 (1962).
5. Melting points are uncorrected. Optical rotations were taken in 1% dioxane solution at 24°±1. UV-spectra were determined in EtOH with an Optica CF4 spectrophotometer. IR-spectra (w, weak) were measured in Nujol with a Perkin-Elmer instrument. We are indebted to Dr.C. Pedrali for the spectral determinations.