Page 19 - Pharmaceutical Organic Chemmistry-3 (Theoritical book) 24-25

Clinical Pharmacy PharmD - 2024/2025 Level 2 Pharmaceutical Organic Chemistry-3 (PC 305)

C- Fused Heterocyclic compounds:

• Numbering starts with the nearest atom to the junction and giving the

heteroatom the lowest numbering.

• There is no numbering of the contact position of fused rings.

N.B. : Fused Heterocyclic compounds: exception in numbering