Table 1. Summary of all identified and analyzed metabolites in HepG2 cell extracts and their numbers on ¹H-NMR spectra.

Metabolite	No.	Metabolite	No.	Metabolite	No.
2-Oxoglutarate	1	Glutamate	21	Pantothenate	41
Acetate	2	Glutamine	22	Phenylalanine	42
Alanine	3	sn-Glycero-3-phosphocholine	23	Proline	43
Arginine	4	Glycine	24	Putrescine	44
Asparagine	5	Guanosine	25	Pyroglutamate	45
Aspartate	6	Histidine	26	Serine	46
Betaine	7	Hypoxanthine	27	Succinate	47
Choline	8	Inosine	28	Taurine	48
Creatine	9	Isoleucine	29	Threonine	49
Cystathionine	10	Lactate	30	Thymine	50
Cysteine	11	Leucine	31	Tryptophan	51
Cystine	12	Lysine	32	Tyrosine	52
UDP-N-GlcNAc	13	Malate	33	Uracil	53
Dimethylamine	14	Mannose	34	Uridine	54
Ethanol	15	Methanol	35	Valine	55
Ethanolamine	16	Methionine	36	Xanthine	56
Formate	17	N-Acetylaspartate	37	Acetone	57
Fumarate	18	NAD+	38	Sarcosine	58
Glucose	19	Nicotinurate	39	Glucose-6-phosphate
β-Alanine	20	O-Phosphocholine	40	Oxypurinol

UDP-N-GlcNAc: UDP-N-Acetylglucosamine.