. . "A ??20 -enamide acylate of the formula ##STR78## and C3 protected forms thereof where R6 is a hydrogen or fluorine atom or methyl group;R9 is nothing, a hydrogen, fluorine or oxygen atom which makes the C ring(a) ??9(11) when R9 is nothing and (b) 9??,11-epoxide when R9 is an oxygen atom; R11 is a hydrogen or oxygen atom, two hydrogen atoms, or ??- or ??-hydroxyl group which makes the C-ring(a) ??" . . . .