Complex sentence: Oxandrolone, also known as Oxandrin, is an anabolic steroid first made by Raphael Pappo while at Searle Laboratories, now Pfizer Inc., under the trademark Anavar, and introduced into the United States in 1964.
Split into simpler sentences: Oxandrolone, also known as Oxandrin, is an anabolic steroid. It was first made by Raphael Pappo while at Searle Laboratories, now Pfizer Inc., under the trademark Anavar, and introduced into the United States in 1964.