Schneider, Bernd Research Group Biosynthesis / NMR, MPI for Chemical Ecology, Max Planck Society;
Oberthur, C., Schneider, B., Graf, H., & Hamburger, M. (2004). The elusive indigo precursors in woad (Isatis tinctoria L.) - Identification of the major indigo precursor, isatan A, and a structure revision of isatan B. Chemistry and Biodiversity, 1(1), 174-182. doi:10.1002/cbdv.200490009.