in immature mouse testes , the results indicate two biosynthetic pathways leading to c19 steroids from progesterone , one from progesterone via 17-hydroxyprogesterone and androstenedione to testosterone and a second via 5alpha-reduced c21 steroids to 5alpha-reduced c19 steroids such as androsterone and 5alpha-androstane-3alpha,17beta-diol .
C0039601
testosterone
C0002854
androstane