You'll find two informative research articles Rob wrote on ecdysterone supplements, and specifically the supplement Kre-Anabolyn, linked directly below. He goes into "gray market" ecdy items of the past quite extensively, and reveals how Kre-Anabolyn first came into being.
https://bodybuildingsupplements.com/rhaponticum-carthamoides.html
https://bodybuildingsupplements.com/ecdysterone-studies.html
Rob's trial on Adaptogen- https://bodybuildingsupplements.com/adaptogen.html
He is also quoted in the extensive Q&A on Kre-Anabolyn and ecdysterone supplements, here- https://bodybuildingsupplements.com/leuzea_ecdy.html