the steroids effective in inducing maturation have in common a c=0 ( or alpha-oh ) group at 3c and a beta-oh group at 17c in the c19-steroids , and a c=o ( or beta-oh ) group at 3c and a c=o ( or alpha-oh ) group at 20c in the c21-steroids , in addition to an delta4- or delta5-unsaturated for 5alpha-saturated configuration .
C0038317
steroids
C0033006
c21-steroids