Profile: Focus Synthesis LLC is a new research chemical supplier that uses principles based in chemoinformatics in the design of chemical building blocks that are ideally suited for DOS (Diversity-Oriented Synthesis). We offer synthons, building blocks and research chemicals that are optimized for drug discovery using chemoinformatics-based design. In addition to being a research chemical supplier specializing in drug candidate intermediates and other organic chemicals, we also provide custom synthesis outsourcing, in-house custom chemistry and proprietary design services. We also specialize in cheminformatic gap fillers.