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Table 3 56 out of 99 compounds not included in the five classes

From: GC/MS based metabolomics: development of a data mining system for metabolite identification by using soft independent modeling of class analogy (SIMCA)

Class

Name

IUPAC

Predicted Name

Benzene

4-Aminobenzoic acid

4-aminobenzoic acid

No annotation

 

Benzoic acid

benzoic acid

No annotation

 

o-Toluic acid

2-methylbenzoate

No annotation

 

Phenylalanine

(2S)-2-amino-3-phenylpropanoic acid

No annotation

 

Tyrosine

(2S)-2-amino-3-(4-hydroxyphenyl)propanoic acid

No annotation

 

Ferulic acid

(E)-3-(4-hydroxy-3-methoxyphenyl)prop-2-enoic acid

No annotation

 

Dopa

(2S)-2-amino-3-(3,4-dihydroxyphenyl)propanoic acid

No annotation

Alpha-Keto acid

2-Oxoglutaric acid

2-oxopentanedioic acid

No annotation

 

Pyruvic acid

2-oxopropanoic acid

Amine

Indole, Imidazole

Histidine

(2S)-2-amino-3-(1H-imidazol-5-yl)propanoic acid

No annotation

 

Histidinol

2-amino-3-(1H-imidazol-5-yl)propan-1-ol

No annotation

 

Tryptophan

(2S)-2-amino-3-(1H-indol-3-yl)propanoic acid

No annotation

Purine, Pyrimidine

Adenine

7H-purin-6-amine

No annotation

 

Caffeine

1,3,7-trimethylpurine-2,6-dione

No annotation

 

Cytosine

6-amino-1H-pyrimidin-2-one

No annotation

 

Guanine

2-amino-3,7-dihydropurin-6-one

No annotation

 

Inosine

9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-3H-p urin-6-one

No annotation

 

Thymine

5-methyl-1H-pyrimidine-2,4-dione

No annotation

 

Uracil

1H-pyrimidine-2,4-dione

No annotation

 

Xanthine

3,7-dihydropurine-2,6-dione

No annotation

Amino acid

2-Aminobutyric acid

2-aminobutanoic acid

No annotation

 

2-Aminoisobutyric acid

2-amino-2-methylpropanoic acid

No annotation

 

4-Aminobutyric acid

4-aminobutanoic acid

Amine

 

Alanine

(2S)-2-aminopropanoic acid

No annotation

 

Allothreonine

(2S,3S)-2-amino-3-hydroxybutanoic acid

No annotation

 

Asparagine

(2S)-2,4-diamino-4-oxobutanoic acid

No annotation

 

Aspartic acid

(2S)-2-aminobutanedioic acid

No annotation

 

Citrulline

(2S)-2-amino-5-(carbamoylamino)pentanoic acid

No annotation

 

Cysteine

(2R)-2-amino-3-sulfanylpropanoic acid

No annotation

 

Glutamic acid

(2S)-2-aminopentanedioic acid

No annotation

 

Glutamine

(2S)-2,5-diamino-5-oxopentanoic acid

No annotation

 

Glycine

2-aminoacetic acid

Amine

 

Glycyl-glycine

2-[(2-aminoacetyl)amino]acetic acid

No annotation

 

Homoserine

2-amino-4-hydroxybutanoic acid

No annotation

 

Isoleucine

(2S,3S)-2-amino-3-methylpentanoic acid

No annotation

 

Leucine

(2S)-2-amino-4-methylpentanoic acid

No annotation

 

Lysine

(2S)-2,6-diaminohexanoic acid

No annotation

 

Methionine

(2S)-2-amino-4-methylsulfanylbutanoic acid

No annotation

 

N-Acetyl-DL-valine

2-acetamido-3-methylbutanoic acid

No annotation

 

Ornithine

(2S)-2,5-diaminopentanoic acid

No annotation

 

Proline

(2S)-pyrrolidine-2-carboxylic acid

No annotation

 

Sarcosine

2-(methylamino)acetic acid

No annotation

 

Serine

(2S)-2-amino-3-hydroxypropanoic acid

No annotation

 

Threonine

(2S,3R)-2-amino-3-hydroxybutanoic acid

No annotation

 

Valine

(2S)-2-amino-3-methylbutanoic acid

No annotation

 

β-Alanine

3-aminopropanoic acid

No annotation

Other

2-Hydroxypyridine

1H-pyridin-2-one

No annotation

 

4-Hydroxypyridine

1H-pyridin-4-one

No annotation

 

Phosphoric acid

phosphate

Sugar phosphate

 

Kojic acid

5-hydroxy-2-(hydroxymethyl)pyran-4-one

No annotation

 

Nicotinic acid

pyridine-3-carboxylic acid

No annotation

 

Quinic acid

(3R,5R)-1,3,4,5-tetrahydroxycyclohexane-1-carboxylic acid

No annotation

 

Propyleneglycol

propane-1,2-diol

No annotation

 

Creatinine

2-amino-3-methyl-4H-imidazol-5-one

No annotation

 

Urea

urea

Organic acid

 

Ascorbic acid

(2R)-2-[(1S)-1,2-dihydroxyethyl]-4,5-dihydroxyfuran-3-one

No annotation

  1. The detail is shown in Table 2.