Chem-Stone, Inc. was founded by a group of veteran medicinal and process chemists from Merck and Genentech. Chem-Stone, Inc. as a contract research organisation (CRO) is dedicated to provide high quality process R&D, medicinal chemistry and custom services to pharmaceutical and biotech companies around the world. Our featured product lines include multi-functional group cyclopropanes, oxetanes, azepanes and hard to find heterocyic boronic acids.