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Table 1 Relative percentages of constituents and extraction yields of EOs from A. sativum, A. cepa bulbs, D. gossweileri stem barks and P. brazzeana roots

From: Chemical composition, in vitro antioxidant and anti-inflammatory properties of essential oils of four dietary and medicinal plants from Cameroon

Components

RI

Relative percentage (%)

A. cepa

A. sativum

D. gossweileri

P. brazzeana

2,4-dimethylthiophene

884

-

0.63

0.03

-

Diallyl sulfide

888

1.38

7.10

0.11

-

2,5-dimethyl thiophene

908

0.82

-

 

-

Allyl methyl disulfide

918

-

-

0.01

-

Methyl propyl disulfide

922

-

1.19

-

-

N,N’-Dimethyl thiourea

951

-

-

0.01

-

Benzaldehyde

962

-

-

0.28

-

dimethyl trisulfide

964

-

0.58

-

-

2-Phenyl furan

978

-

0.48

-

-

Octyl aldehyde

990

2.26

-

-

-

phenylacetaldehyde

1026

2.69

-

0.06

-

Limonene

1029

-

0.62

-

-

2-propenyl propyl disulfide

1032

5.15

0.20

0.02

-

2,5-dimethyl-1,3,4-thiadiazole

1037

-

0.74

-

-

Terpinolene

1059

-

-

0.02

-

Phenylmethanol

1081

-

-

0.01

-

Diallyl disulfide

1088

-

19.74

 

-

Trans-propenyl propyl disulfide

1091

2.86

-

-

-

Linalool

1101

-

0.88

-

-

Dipropyl disulfide

1109

2.71

0.62

-

-

1-propenyl propyl disulfide

1114

3.77

-

-

-

3,5-dimethyl-1,2,4-trithiolane

1118

1.81

-

-

-

Campholenol

1124

-

-

0.03

0.31

Allyl methyl trisulfide

1149

-

12.95

-

-

Methyl propyl trisulfide

1153

8.14

-

-

-

Benzylcyanide

1157

2.52

-

35.72

0.86

3,4-Dihydro-3-vinyl-1,2-dithiin

1165

-

1.37

-

-

Dimethyl tetrasulfide

1224

1.32

1.59

0.02

-

2,5-Dimethylthiazole

1265

4.62

-

-

-

Diallyl trisulfide

1319

22.17

41.62

-

-

3-Methoxyoctane

1327

-

0.62

-

-

Dipropyl trisulfide

1334

11.11

-

-

-

1-propenyl propyl sulfide

1345

1.26

-

-

-

Allyl propyl sulfide

1377

-

1.30

-

-

Di-1-propenyl sulfide

1382

1.71

2.08

-

-

Benzylisothiocyanate

1393

-

-

63,19

97.63

p-methoxybenzylcyanide

1395

-

0.85

-

1,2

Β-caryophyllene

1398

-

0.23

-

-

2-methyl-3-isothiozolone

1435

2.23

-

--

-

Germacrene D

1484

-

-

0.02

-

γ-cadinene

1506

-

0.39

-

-

2-methyl-3,4-dithiaheptane

1527

9.88

-

-

 

Β-sesquiphellandrene

1550

-

-

0.05

-

Diallyl tetrasulfide

1558

-

4.22

-

-

p-methoxybenzylisothiocyanate

1575

3.55

-

-

-

Dipropyl tetrasulfide

1649

8.07

-

-

-

Benzyl sulfide

1856

-

-

0.06

-

Methyl linolenate

2013

-

-

0.06

-

Total identified (%)

98.77

100

99.70

100

EOs extraction yields (%)

0.007

0.2

0.04

0.02

  1. RI linear retention indices on a HP5 column; − not found; EO essential oils