Fig 2. A representative ¹H-NMR spectrum of the metabolites identified in Jerusalem artichoke tubers.

(1) isoleucine, (2) leucine, (3) valine, (4) ethanol, (5) threonine, (6) alanine, (7) arginine, (8) glutamate, (9) glutamine, (10) 4-aminobutyrate, (11) malate, (12) succinate, (13) citrate, (14) aspartate, (15) asparagine, (16) 2-oxoglutarate, (17) malonate, (18) choline, (19) O-phosphocholine, (20) betaine, (21) glycine, (22) fructose, (23) sucrose, (24) glucose, (25) fumarate, (26) tyrosine, (27) histidine, (28) phenylalanine.