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Fig. 5 | Biotechnology for Biofuels

Fig. 5

From: Mechanistic insight in the selective delignification of wheat straw by three white-rot fungal species through quantitative 13C-IS py-GC–MS and whole cell wall HSQC NMR

Fig. 5

Structures annotated by HSQC NMR. A: β-O-4′alkyl-aryl ether (A′: γ-acylated β-O-4′alkyl-aryl ether); Aox: β-O-4′alkyl-aryl-ether Cα-oxidized; B: phenylcoumaran; C: resinol; T: tricin; pCA: p-coumarate; FA: ferulate; G: guaiacyl unit; Gox: Cα-oxidized guaiacyl unit; S: syringyl unit; S: Cα-oxidized syringyl unit; H: p-hydroxyphenyl unit; Sald: syringaldehyde; dotted line represents –H or –OCH3. R in Gox and Sox can be a side chain in ketones or hydroxyl in carboxylic acids. Wavy lines indicate main positions of further coupling. Colors match the assigned contours in Fig. 4

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