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. 2015 Jul 6;5:11848. doi: 10.1038/srep11848

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2D ¹H-¹H planes at (a) 29.94, (b) 54.01 (folded spectrum; 94.01), (c) 54.01 (94.01), and (d) 69.94 ppm of ¹³C axis of the 3D ¹H-¹H-¹³C spectrum are shown. Red lines connect the ¹H-¹³C-¹³C-¹H cross peaks of the assigned metabolites. Asn, Asparagine; Arg, Arginine; Lys, Lysine; Gln, Glutamine.