16)12-6-9-5-8-3-4-13(15)18-10(8)7-11(9)17-12/h3-5,7,12,16H,6H2,Marmesin (nodakenetin) is a chemical compound precursor in psoralen and linear furanocoumarins biosynthesis. Marmesin (nodakenetin) is a chemical compound precursor in psoralen and linear furanocoumarins biosynthesis.