Metabolomics studies identify novel diagnostic and prognostic indicators in patients with alcoholic hepatitis

Table 1 Characteristic precursor-product transitions

	Name	Precursor	Product
Analytes	Trimethylamine N-oxide	76	58
	Choline	104	60
	Betaine	118	59
	Valine	118	72
	Leucine	86	43
	Isoleucine	86	56
	Ornithine	133	70
	Crotonobetaine	144	59
	Butyrobetaine	146	60
	Lysine	147	84
	Methyl-lysine	161	84
	Carnitine	162	60
	Phenylalanine	166	120
	Arginine	175	70
	Citrulline	176	70
	Tyrosine	182	136
	Methyl-arginine	189	70
	Symmetric dimethyl-arginine	203	70
	Asymmetric dimethylarginine	203	70
	Acetyl-carnitine	204	85
	Propionyl-carnitine	218	85
	Butyryl-carnitine	232	85
	Pentanoyl-carntine	246	85
	Hexanoyl-carnitine	260	85
	Octenoyl-carnitine	286	85
Internal standard	Trimethylamine N-oxide-d9	85	66
	Choline-trimethyl-d9	113	69
	Betaine-trimethyl-d9	127	68
	Valine-13C5, 15N1	124	77
	Leucine-13C6, 15N1	139	92
	Ornithine 3, 3, 4, 4, 5, 5-d6	139	76
	Crotonobetaine-trimethyl-d9	153	68
	Butyrobetaine-trimethyl-d9	155	69
	Lysine-u-13C6, 15N2	155	90
	Phenylalanine-13C6	172	126
	Citrulline 2, 3, 4, 5-d4	180	74
	Arginine-13C6	181	74
	Tyrosine-u-13C9, 15N1	192	145
	Asymmetric dimethylarginine 2, 3, 3, 4, 4, 5, 5-d7	210	77
	Acetyl-carnitine-d3	207	85
	Propionyl-carnitine-d3	221	85
	butyryll-carnitine-d3	235	85
	Pentanoyl-carnitine-d9	246	85
	Hexanoyl-carnitine-d3	263	85