I know 6-bromo is an AI...I found this with a google search:
"Bromodrol is a synergistic blend of pharmaceutical grade extracts designed to produce lean muscle mass without side effects such as, water retention, aggression, Gyno, negative effects on GnRH (Gonadotropin releasing Hormone), or negative effects on FSH (follicle stimulating hormone).
Bromodrol uses a combination 6 bromo 3,17 dioxoetioallocholan and natural herbal extracts to create a perfect anabolic environment conducive to muscle growth. Bromodrol is an incredibly efficient selective aromatase inhibitor (SAI) working to efficiently reduce the presence of non anabolic estrogen while optimizing free and serum testosterone levels."
Hope it helped a little