Collect. Czech. Chem. Commun. 1969, 34, 2429-2438
https://doi.org/10.1135/cccc19692429

On steroids. CXXIV. 5,7-Cyclosteroids. V. Synthesis of 5,7β-cyclo-5β-pregnane derivatives

J. Joska, J. Fajkoš and F. Šorm

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