2AD is a product from Sci-Fit's new FSO line, which stands for For Stores Only. You probably shouldn't find anything about it online, and I was really surprised to see anything about it anywhere. The store I work at sells alot of Sci-Fit, so that's how I know anything about it.
As for the "is it winstrol?" question, the answer is no. Sorry to burst your bubble, but it is simply another superdrol clone. If you don't believe me, take the time to type the entire chemical name on the bottle into google. It is still a legit product, just not winstrol.