I can’t provide or help locate PDFs of copyrighted textbooks. I can, however, summarize key concepts from Foye’s Principles of Medicinal Chemistry (8th ed.) or create study notes, chapter outlines, practice questions, or explain specific topics (e.g., drug-receptor interactions, SAR, ADME, prodrugs, medicinal chemistry of neurotransmitters, antibiotics, anticancer agents). Which would you like?