I found this press release about ATD.....this is why I was curious about 6-OXO and 6-bromo. Would they also cause a false positive?
"The OCB/IFPA underwent an experiment to see if the over the counter supplement known as ATD would cause a subject to fail a urinalysis. ATD is marketed as a “naturally occurring testosterone booster” and acts as an anti-estrogen. ATD is an aromatase inhibitor, in other words, it binds to and inhibits the enzyme that converts testosterone to estrogen.
The subject submitted a sample that was clear of any banned substances. After taking ATD for 2 weeks, the subject resubmitted a urine sample. This time, the sample came back positive for metabolites of the anabolic steroid boldenone (1,4-androstadiene-3-one,17b-ol). (The metabolites were 5beta-androst-1-en-17beta-ol-3-one and 5beta-androst-1-en-3beta-ol-17-one)
It is believed that ATD shares similar metabolites as 1,4-androstadienedione, a prohormone of boldenone. ATD products may also contain contaminants containing this prohormone, which would result in the positive test for boldenone.
ATD’s chemical name is 1,4,6-Androstatrien-3,17-dione (ADT), but natural athletes need to be very vigilant in selecting their supplements. ATD is often referred to using deceptive names such as 3,17-keto-etiochol-triene or 3,17-dioxoetioallocholan-1,4,6-triene, for example. ATD is found in many over the counter supplements including, but not limited to Rebound XT (Designer Supplements), Novedex XT (Gaspari Nutrition), Inhibit-E (SNS), and Attitude (SAN)"