Sirius Fine Chemicals SiChem GmbH synthesizes APIs for early stage (Toxicology) drug design. A special field of expertise is the preparation of biologically and pharmacologically active compounds with increased bioavailability (prodrugs). We are one of the leading providers for inositol phosphates as well as a large variety of membranepermeant and photoactivatable derivatives. Our portfolio has been supplemented by clickable unnatural amino acids and other useful tools for Click-Chemistry.