They mainly occupy 3b, 6a (or b), 15a (or b) and 16b positions in the steroidal nucleus with hydroxyl groups occasionally
found at 4b, 5a, 7a (or b) and 8 positions. Diverse side chains occur in these compounds but in a majority of them hydroxyl
groups are attached to C-24, C-26 or to one of the carbons in alkyl constituents at C-24 but rarely occurs at C-25