C21H28O2

The molecular formula C21H28O2 (molar mass: 312.44 g/mol) may refer to:11-Dehydroprogesterone Demegestone Dydrogesterone Ethisterone, a progesterone hormone Guggulsterone Levonorgestrel Norgestrel, a progestin (Dextronorgestrel) Pregna-4,20-dien-3,6-dione Tetrahydrogestrinone, an anabolic steroid Tibolone, a steroid hormone Δ4-Tibolone, a metabolite of tibolone Trimethyltrienolone 7,8-Dihydrocannabinol