Complex sentence: Androstenediol is a term used to refer to two different steroids with molecular weights of 290.44: "4-androstenediol" (4-androstene-3beta,17beta-diol) and "5-androstenediol" (5-androstene-3beta,17beta-diol).
Split into simpler sentences: Androstenediol is a term used to refer to two different steroids with molecular weights of 290.44. They are 4-androstenediol (4-androstene-3beta,17beta-diol) and 5-androstenediol (5-androstene-3beta,17beta-diol).