Table 2.

Phytoconstituents of Aloe species detected by gas chromatography coupled to mass spectrometry (GC–MS).

Aloe Species	Phytochemicals	Reference
Leaves
A. albiflora	Trimethylsilyl ether 2-hexanol, benzene acetaldehyde, lactic acid, benzyldimethylsilyl ester hydrocinnamic acid, 2,4-dimethyl benzaldehyde, 2-ethyl phenol, trimethylsilyl ether 9-decen-1-ol, trimethylsilyl ester benzene acetic acid, trimethylsilyl ester nonanoic acid, 2-methoxy-3-(2-propenyl)-phenol, 3-(2-trimethylsilyloxyethyl)-phenol, methyleugenol, phenyl 1,2-ethanediol, 2,4-bis(1,1-dimethylethyl)-phenol, 2-methyl-1-hexadecanol, nonadecane, 1-methylethyl ester dodecanoic acid, lauric acid, β-bisabolol, 2,6,10-trimethyl-tetradecane, tert-hexadecanethiol, tetradecanoic acid, pentadecanoic acid, ethyl ester cholestenol acid, trimethylsilyl ester cis-9-hexadecenic acid, palmitic acid, cis-13-eisosenoic acid, heptadecanoic acid, ethyl 9,12,15-octadecatrienoate, linoleic acid, α-linolenic acid, octadecanoic acid, eicosanoic acid, squalene, and β-sitosterol	[42]
A. aristata	Benzeneacetaldehyde, lactic acid, 2-methyl-2-indecanethiol, 2,5-dimethyl-benzaldehyde, 2-ethyl-phenol, trimethylsilyl ether 3-ethylphenol, p-ethylguaiacol, phosphoric acid, tridecane, (E)-3-eicosene, 2-methyl-1-hexadecanol, 2,6,11-trimethyl-dodecane, eugenol, vanillin, methyleugenol, hexadecane, 2,4-bis(1,1-dimethylethyl)-phenol, nonadecane, 1-methlethyl ester dodecanoic acid, lauric acid, 2,6,10-trimethyl tetradecane, 2,6,10,15-tetramethyl heptadecane, trimethylsilyl ester myristic acid, pentadecanoic acid, ethyl palmitate, trimethylsilyl ester cis-9-hexadecenoic acid, palmitic acid, trimethylsilyl ester cis-10-heptadecenoic acid, heptadecanoic acid, ethyl ester 9,12-octadecadienoic acid, ethyl 9,12,15-octadecatrienoate, linoleic acid, α-linolenic acid, octadecanoic acid, α-amyrin, squalene, ethyl iso-allocholate, and β-sitosterol	[42]
A. aspera	Trimethylsilyl ether 2-pentanol, m-pyrol, lactic acid, 3,5-dimethyl-benzaldehyde, benzoic acid, succinic acid, fumaric acid, nonanoic acid, tetradecane, trimethylsilyl ester decanoic acid, 2,4-bis(1,1-dimethylethyl)-phenol, 2,3,5,8-tetramethyl-decane, 2-methyl-1-hexadecanol, hexadecane, 1-methylethyl ester dodecanoic acid, lauric acid, nonadecane, 2,6,10,15-tetramethyl-heptadecane, 2,6,10-trimethyl-tetradecane, azelaic acid, isopropyl ester myristic acid, tetradecanoic acid pentadecanoic acid, trimethylsilyl ester cis-9-hexadecenoic acid, palmitic acid, heneicosane, heptadecanoic acid, linoleic acid, trimethylsilyl ester oleic acid, octadecanoic acid, eicosanoic acid, trimethylsilyl ester 1-docosanol, docosanoic acid, squalene, trimethylsilyl ester tetracosanoic acid, γ-tocopherol, ethyl iso-allocholate, 1-heptatriacotanol, campesterol, stigmasterol, β-sitosterol	[42]
A. excelsa	Limonene, carvone, and 2-phenylacetonitrile	[43]
A. ferox	Polyphenols/phenolic compounds (phenol, gentisic, cholestenol, homovanilic, O-hydroxycinnamic, protocatechuic, 3,4-dihydroxyphenylacetic, 5-methoxyprotocatechuic, syringic, sinapic, p-coumaric, caffeic, isoferulic, ferulic, 4-methoxycinnamic, aloe emodin, 4-phenyllactic, 4-ethylphenol, p-toluic, hydrocinnamic, p-salicylic, benzoic, mandelic, hydroxyphenylacetic, pyrocatechuic, hydro-p-coumaric, and 6,7-dihydroxycoumarin); organic acids (isovaleric, lactic, glycolic, furoic, 3-hydroxypropionic, 2-hydroxyvaleric, cyclohexanone-3-carboxylic, 3-hydroxyisovaleric, 3-methyl-1,3-hydroxybutanoic, 2-hydroxycaproic, 2-ketoisovaleric, succinic, 2-methylsuccinic, methylmalic, malic, 3,4,5-trihydroxypentanoic, d-ribonic, suberic, 3-hydroxypicolinic, and isonicotinic); fatty acids (lauric, myristic, cholestenol, palmitoleic, palmitic, stearic, linoleic, oleic, linolenic, erucic, cholestenol, arachidic, heneicosanoic, behenic, tricosanoic, lignoceric and pentacosanoic); alkaloids (hypoxanthine and xanthine); indoles (indole-5-acetic acid, and indole-3-acetic acid); pyrimidines (uracil and thymine); alkanes (1,3-dihydroxybutane); sterols (cholestenol, campestrol, â-sitosterol, and stigmasterol); dicarboxylic acids (azelaic and undecanedioic), and ketones (4,6-dimethyl-2-heptanone, acetophenone, and 2,4-dimethyl-4-heptanone)	[44]
A. jucunda	Benzaldehyde, lactic acid, 2-ethyl phenol, benzoic acid, ester octanoic acid, phenylacetic acid, 4-ethyl-1,2-benzene, dimethoxy-benzaldehyde, 4-vinylveratrole, eugenol, tetradecane, methyleugenol, 2-allyl-1,4-dimethoxy-3-methyl-benzene, nonadecane, 3,5-bis(1,1-dimethylethyl)-phenol, 1,2-dimethoxy-4-(2-methoxyethenyl)benzene, 1-dodecanol, estragole, dodecanoic acid, 1-methylethyl ester, 4-hydroxybenzoic acid lauric acid, β-bisabolol, 2,6,10-trimethyl-tetradecane, geranyl isovalerate, tetradecanoic acid, 3,5-bis(1,1-dimethylethyl)-4-benzoic acid, methyl ester hexadecenoic acid, 2,4,6-tris(1,1-dimethylethyl)-phenol, ethyl palmitate, trimethylsilyl ester palmitelaidic acid, palmitic acid, methyl ester linolenic acid, heptadecanoic acid, ethyl ester 9,12-octadecadienoic acid, ethyl 9,12,15-octadecatrienoate, ethyl ester stearic acid, linoleic acid, α-linolenic acid, octadecanoic acid, ester eicosanoic acid, bumetrizole, trimethylsilyl ester cis-13-docosenoic acid, ester docosanoic acid, squalene, heptacosane, ethyl iso-allocholate, and β-amyrin	[42]
A. vera	Debocane, 4-methyl, tricosane, 6-hydroxyhexane-3-1, 1-dodecanol, 1-octadecanol, cholestenol acid, 9-octadecenoic acid, octadecanoic acid, 1-(phenylthioxomethyl)piperidine, docosane, sitosterol, and stigmasterol	[45]
	Phenolic acids or polyphenols (phenol, cholestenic acid, homovanilic acid, protocatechuic acid, 3,4-dihydroxyphenylacetic acid, 5-methoxyprotocatechuic acid, and syringic acid. Sinapic acid, p-coumaric acid, isoferulic acid, ferulic acid, aloe emodin, 4-phenyllactic acid, 4-ethylphenol, hydrocinnamic acid, p-salicylic acid, benzoic acid, and hydro-p-coumaric acid); alcohols (2-butanol, glycerol, and phenylethanol); aldehydes (benzaldehyde and m-tolualdehyde); organic acids (lactic acid, glycolic acid, pyruvic acid, furoic acid, phosphoric acid, succinic aid, 2-methylsuccinic acid, malicnaicd, tartaric acid, and isonicotinic acid); alkanes (1,3-dihydroxybutane); pyrimidines (uracil and thymine) fatty acids (lauric acid, myristic acid, palmitoleic acid, and linoleic acid) indoles (indole-3-acetic acid); alkaloids (hypoxanthine); ketones (acetophenone); sterols (cholestenol and β-sitosterol); dicarboxylic acids (azelaic acid and undecanedioic acid)	[6]
	Ethylene glycol, propylene glycol, 2,3-bis(trimethylsiloxy)-butane, glycolic acid, 6-methyl-octadecane, 4-ethylbenzaldehyde, 4-hydroxybutyric acid, benzoic acid, (±)-2-Hydroxyoctanoic acid, octanoic acid, succinate, methyl succinic acid, glyceric acid, fumaric aicd, nonanoic acid, 2-methoxy-3-(2-prophenyl)-phenol, teradecane, methyleugenol, glutarate, 4-allyl-2-methoxyphenoxy-i-dodecanol, β-copaene, malic acid, adipic acid, 2-methyl-1-hexadecanol, bis(trimethylsilyl-pyroglutamic acid, m-hydroxybenzoic acid, pimelic acid, 1-methylethyl ester dodecanoic acid, 4-hydroxybenzoic acid, lauric acid, 1-[(trimethylsilyl)oxy]-2-methylanthraquinone, suberic acid, geranyl isovalerate, 2,6,10-timethyl tetradecane, bis(trimethylsilyl) ester 1,3-benzenedicarboxylic acid, azelaic acid, protocatechuic acid, tetradecanoic acid, sebacic acid, pentadecanoic acid, 2,4,6-tris(1,1-dimethylethyl phenol, undecadioic acid, trimethylsilyl ester palmitelaidic acid, palmitic acid, phytol, (2E)-3,7,11,15-tetramethyl-2-hexadecenyl trimethylsilyl ether, dodecanedioic acid, linoleic acid, α-linolenic acid, octadecanoic acid, eicosanoic acid, 2-monopalmitoylglycerol trimethylsilyl ester, 1-monopalmitin trimethylsilyl ester, docosanoic acid, 9-octadecenoic acid, 1,3-bis-(OTMS)-2-propyl ester, squalene, trimethylsilyl ester tetracosanoic acid, heptacosane, O-trimethylsilyl-(+)-α-tocopherol, β-sitosterol and β-amyrin	[42]