1. Pfizer acquires rights to YP05002, an anti-obesity drug from Fosun Pharma. 2. The deal could be valued over $2 billion, linking Pfizer to growing GLP-1 market. 3. Pfizer includes an opt-out clause in case of unsuccessful drug trials. 4. GLP-1 therapies have rapidly grown in sales, highlighting competitive pressures. 5. Pfizer aims to revamp its pipeline amid upcoming patent expirations.