3d image of butagest skeletal formula

butagest buterol steroidal progestin megestrol acetate rendering pharmacology medicament prodrug pharmaceutical pharmaceutics synthetic medication pharmacophore hormonal prohormone remedy birth control synthon obstetrics endocrine contraindications birth interaction analogue steroid mother level function woman hormone pharmacokinetics preparation semisynthetic medicine pharmacy gynecology replacement endogenous effect pharmacodynamics iatrogenic side pharma therapy contraception