牋牋Porphyrin Systems GbR is a company engaged in synthesis and investigation of porphyrins and related compounds. The company was founded in January 1999 in L黚eck, Germany. Research at Porphyrin Systems is focused on the development of new porphyrinic photosensitizers for photodynamic therapy of cancer (PDT). In this field, the company cooperates with the Medical Laser Center L黚eck GmbH and with partners at other German and European institutes and universities. Furthermore, the company is interested in any application of porphyrinic compounds in science and technology. Besides this research topic, Porphyrin Systems is developing new cost-efficient synthetic routes to all kinds of porphyrinic compounds. We look forward to support our customers in innovative research regarding porphyrin chemistry.