The elusive indigo precursors in woad (Isatis tinctoria L.) - Identification of 
the major indigo precursor, isatan A, and a structure revision of isatan B

Oberthur, C.; Schneider, Bernd; Graf, H.; Hamburger, M.

doi:10.1002/cbdv.200490009

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The elusive indigo precursors in woad (Isatis tinctoria L.) - Identification of the major indigo precursor, isatan A, and a structure revision of isatan B

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Schneider, Bernd
Research Group Biosynthesis / NMR, MPI for Chemical Ecology, Max Planck Society;

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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.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0012-B5E0-8

Abstract

A metabolite-profiling study of shock-frozen leaves of Isatis tinctoria L., an old indigo dye plant and medicinal herb, revealed a complex pattern of indigo-forming compounds with higher polarities than the known indigo precursors isatan B and indican.