Page 26 - Pharmaceutical Organic Chemmistry-3 (Theoritical book) 24-25

Clinical Pharmacy PharmD - 2024/2025 Level 2 Pharmaceutical Organic Chemistry-3 (PC 305)
3. The component is the one with higher number of rings.

The parent is quinoxaline but not pyrazine.

4. The parent component is the largest single ring.

Pyridine is the parent component (not pyrrole).

5. The parent component is the one having higher number of heteroatoms.

Pyrimidine has the priority as a parent component over pyridine.

6. The parent component is that with greater varieties of heteroatoms.

1,3-Thiazole is the parent component.