3d image of 19-norprogesterone skeletal formula

19-norprogesterone steroidal progestin rendering block androgen metabolic tautomer biosynthesis prohormone material function mineralocorticoid androgenic anabolic biosynthetic biology body-building production derivative pathway path transgender science atom male research organic structure norsteroid formula precursor isolated steroidal model masculinizing functional transmasculine endocrine intersex contraception human metabolome database bodybuilding replacement stick synthetic scientific bioprecursor