Granlen LLC We are a multinational chemistry-based contract research organization that offers an integrated discovery and development platform for the biotech and pharmaceutical industries. Our state of the art research facilities are located in Zhengzhou, China the transportation and business central garden city. With management in San Diego and China, and a commitment to total quality excellence, we can rapidly adjust directions to meet client’s needs. Our world-class chemistry team offers made to order compound libraries, hit-to-lead optimization, medicinal chemistry, and a wide range of chemistry services including custom synthesis, intermediates, reference compounds, metabolites and impurities, route scouting, process development, and scale-up.