Extended Data Fig. 6: Structures of intermediates in the herbicolin A biosynthesis.

a, Electrospray ionization spectra of herbicolin A, herbicolin B, intermediate 1–4. b, Structures of herbicolin A, herbicolin B, intermediate 1–4.
a, Electrospray ionization spectra of herbicolin A, herbicolin B, intermediate 1–4. b, Structures of herbicolin A, herbicolin B, intermediate 1–4.