Quantification of Native Lignin Structural Features with Gel‐Phase 2D‐HSQC0 Reveals Lignin Structural Changes During Extraction. - Bourmaud, Claire L.; Bertella, Stefania; Bosch Rico, Anna; Karlen, Steven D.; Ralph, John; Luterbacher, Jeremy S. (Angewandte Chemie International Edition, 2024)