Table 1.

Metabolites contained in the analyzed mixture.

Metabolite Families
Nucleosides	Amino Acids		Sugars	Organic Acids	Others
1-methyladenosine	1-methyl-l-histidine	l-citrulline	d(−)-ribose	citric acid	hypoxanthine
2′′-O-methylcytidine	3-methyl-l-histidine	l-glutamic acid	glucose	ketoglutaric acid	l-carnitine
2-thiocytidine	4-hydroxy-l-proline	l-histidine	trehalose	pimelic acid	serotonin
5-methylcytidine	5-hydroxylysine	l-homocystine	mannitol	succinic acid	tryptamine
cytidine	β-alanine	l-isoleucine	-	creatine	-
guanosine	creatinine	l-leucine	-	-	-
inosine	cysteine	l-methionine	-	-	-
pseudouridine	l-(−)-proline	l-ornithine	-	-	-
ribothymidine	l-(+)-arginine	l-serine	-	-	-
uridine	l-(+)-cystathionine	l-threonine	-	-	-
-	l-(+)-lysine	l-tryptophan	-	-	-
-	l-2-aminoadipic acid	l-valine	-	-	-
-	l-2-amino-n-butyric acid	taurine	-	-	-
-	l-alanine	sarcosine	-	-	-
-	l-anserine	l-aspartic acid	-	-	-
-	l-carnosine	-	-	-	-