"There are a few forms. For instance, this article:
http://www.ncbi.nlm.nih.gov/sites/en...t_uids=3379959
Mentions:
5,16-androstadien-3 beta-ol,

There are also other forms such as 4, 16-androstadien-3 beta-ol,
mentioned in this article:
http://www.ncbi.nlm.nih.gov/pubmed/11457660

They're both beta, but they're different because of the different
positions of the OH groups."