TCG Lifesciences - Official Site TCG Lifesciences, leading contract research organization, drug discovery, India, United States, Europe, Japan and Australia,integrated discovery projects, Central Nervous System (CNS), Inflammation & Pain, Infectious Diseases, BSL 2,BSL 3,The Chatterjee Group (TCG), Flexible Engagement Models, Chembiotek TCG Lifesciences Private Limited. TCG Lifesciences Pvt. Limited (formerly “Chembiotek Research International”) is a leading global Contract Research and Manufacturing Services (CRAMS) company in the area of drug discovery and development.