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Table 1 Essential oil constituents of C. macrocarpa branchlets and C. citriodora leaves

From: Bioactivity of essential oils extracted from Cupressus macrocarpa branchlets and Corymbia citriodora leaves grown in Egypt

Constituent

RIa,b

Percentage

C. macrocarpa

Percentage

C. citriodora

α-Pinene

925

0.1

Thujene

953

0.9

0.4

α-Myrcene

985

2.2

0.1

α-Phellandrene

1005

19.2

α-Terpinene

1015

3.0

Eucalyptol/1,8-Cineole

1017

2.0

m-Cymene

1023

0.4

Limonene

1031

2.1

Terpinolene

1035

1.8

Melonal

1037

0.9

γ-Terpinene

1067

5.3

α-Linalool

1089

1.5

0.4

(+)-Rose oxide

1100

1.2

trans-2-menthenol

1140

1.0

Isopulegol

1145

7.6

D-Camphor

1151

5.4

Citronellal

1159

6.6

Borneol

1175

0.1

Terpinen-4-ol

1192

23.7

0.5

α-Terpineol

1193

1.7

0.2

Piperitol

1205

0.7

α-Citronellal

1211

56.0

α-Citronellol

1233

17.3

14.7

Citronellic acid

1305

1.3

1.4

Cubebol

1501

1.1

Citronellol acetate

1511

12.3

Spathulenol

1564

0.3

Caryophyllene oxide

1571

1.2

Farnesol

1696

0.4

  1. aRI Retention Index
  2. bIdentification of the essential oil components was performed by comparison of mass spectra and RIs obtained in both columns with those of reference compounds and those of mass spectra libraries