1. Prostaglandins, Peptidomimetic Compounds, And Retinoids
2. Drug Based On A Substituted Benzene Ring
3. Indenes, Naphthalenes, And Other Polycyclic Aromatic Compounds
4. Steroids; Part 1: Estranes, Gonanes, And Androstanes
5. Steroids; Part 2: Compounds Related To Progesterone, Cortisone, And Cholesterol
6. Nonsteroidal Sex Hormones And Their Antagonists
7. Opioid Analgesics
8. Drugs Based On Five-Membered Heterocycles
9. Drugs Based On Six-Membered Heterocycles
10. Five-Membered Heterocycles Fused To A Benzene Ring
11. Six-Membered Heterocycles Fused To A Benzene Ring
12. Seven-Membered Heterocyclic Fused To Benzene
13. Heterocyles Fused To Two Aromatic Rings
14. Beta Lactam Antibiotics
15. Heterocycles Fused To Other Heterocyclic Rings
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