Prior art here: http://pubs.acs.org/doi/abs/10.1021/jo01082a022 http://pubs.acs.org/doi/abs/10.1021/jo01082a022 With the sainted Carl Djerassi. There are citat

Prior art here: http://pubs.acs.org/doi/abs/10.1021/jo01082a022 http://pubs.acs.org/doi/abs/10.1021/jo01082a022 With the sainted Carl Djerassi. There are citations that indicate that the plant and its properties were known in the West 100 years ago.