protecting group, and R8 is a methyl group, are referred to hereinafter as (IIc-17??-ORD) compounds and (Ic-17??-ORD) compounds respectively, and are summarized in the formula (IIc-17??-ORD) and (Ic-17??-ORD) respectively.In IIc-17??-OH compounds and Ic-17??-OH compounds, the hydroxyl group in position 17 is present in free form.