Table 2.

Major VOC identifiers of primary lung cancer in breath (reproduced from ¹⁷)

Metabolite number	Breath VOC
1	Isopropyl alcohol
2	4-penten-ol
3	Ethane, 1,1,2-trichloro-1,2,2-trifluoro
4	Propane, 2-methoxy-2-methyl
5	1-propene, 1-(methylthio)-, (E)-
6	2,3-hexanedione
7	5,5-dimethyl-1,3-hexadiene
8	3-hexanone, 2-methyl-
9	1H-indene, 2,3-dihydro-4-methyl
10	Camphor
11	Bicyclo[2,2,1]heptan-2-one, 1,7,7-trimethyl-,(IS)-
12	3-cyclohexane-1-methanol, 4-trimethyl-
13	p-menth-1-en-8-ol
14	5-isopropenyl-2-methyl-7-oxabicyclo[4,1,0]heptan-2-ol
15	Isomethyl ionone
16	2,2,7,7-tetramethyltricyclo[6,2,1,0(1,6)]undec-4-en-3-one
17	2,2,4-trimethyl-1,3-pentanediol diisobutyrate
18	Benzoic acid, 4-ethoxy-, ethyl ester
19	Bicyclo[3,2,2]nonane-1,5-dicarboxylic acid, 5-ethyl ester
20	Pentanoic acid, 2,2,4-trimethyl-3-carboxyisopropyl, isobutyl easter
21	Propanoic acid, 2-methyl-, 1-(1,1-dimethylethyl)-2-methyl-1,3-propanediyl ester
22	1,2,4,5-tetroxane, 3,3,6,6-tetraphenyl-
23	Benzophenone
24	2,5-cyclohexadien-1-one, 2,6-bis(1,1-dimethylethyl)-4-ethyllidene
25	Furan, 2-[(2-ethoxy-3,4-dimethyl-2-cyclohexen-1-ylidene)methyl]-
26	Benzene, 1,1-(1,2-cyclobutanediyl)bis-, cis-
27	Benzene, 1,1-[1-(ethylthio)propylidene]bis-
28	Anthracene, 1,2,3,4-tetrahydro-9-propyl-
29	9,10-anthracenediol, 2-ethyl-
30	Benzene, 1,1-ethylidenebis[4-ethyl-

* metabolites listed exactly as they appear in the original paper