Table 2 Identified volatile components in Syzygium samarangense leaves obtained by hydrodistillation (HD), head space (HS), and supercritical fluid (SF) methods

1

4.93

2-Hexenal

C₆H₁₀O

828

832

nd

10.22

nd

2

5.53

2-Hexenol

C₆H₁₂O

850

854

nd

0.90

nd

3

5.63

1-Hexanol

C₆H₁₄O

854

861

nd

0.85

nd

4

7.49

α -Thujene

C₁₀H₁₆

922

926

2.15

16.47

nd

5

7.67

α-Pinene

C₁₀H₁₆

928

929

7.89

30.18

nd

6

9.31

β-Pinene

C₁₀H₁₆

988

985

0.32

0.93

nd

7

9.66

α-Phellandrene

C₁₀H₁₆

1000

1000

0.50

1.77

nd

8

10.05

α -Terpinene

C₁₀H₁₆

1013

1015

3.33

3.86

nd

9

10.13

p-Cymene

C₁₀H₁₄

1016

1016

19.50

4.87

nd

10

10.41

Sylvestrene

C₁₀H₁₆

1025

1026

0.32

nd

nd

11

10.44

1,8-Cineole

C₁₀H₁₈O

1023

1027

nd

0.66

nd

12

11.02

3-Carene

C₁₀H₁₆

1044

1031

0.06

nd

nd

13

11.31

γ-Terpinene

C₁₀H₁₆

1054

1059

17.84

22.40

nd

14

14.71

Terpinen-4-ol

C₁₀H₁₈O

1163

1168

3.16

nd

nd

15

15.04

α -Terpineol

C₁₀H₁₈O

1173

1173

0.47

nd

nd

16

17.24

Methylcitronellate

C₁₁H₂₀O₂

1248

1250

0.07

nd

nd

17

17.79

Carvacrol

C₁₀H₁₄O

1267

1279

0.24

nd

nd

18

20.87

Ylangene

C₁₅H₂₄

1375

1375

0.08

nd

nd

19

21.24

α-Guaiene

C₁₅H₂₄

1380

1409

0.32

nd

7.06

20

22.01

Caryophyllene

C₁₅H₂₄

1417

1418

2.28

2.71

4.75

21

22.81

Humulene

C₁₅H₂₄

1448

1450

0.21

nd

nd

22

23.37

γ-Muurolene

C₁₅H₂₄

1470

1470

0.52

nd

nd

23

23.96

α-Muurolene

C₁₅H₂₄

1493

1494

0.13

nd

nd

24

25.53

Caryophyllenyl alcohol

C₁₅H₂₆O

1554

1557

0.16

nd

nd

25

25.84

Caryophyllene oxide

C₁₅H₂₄O

1557

1563

8.19

nd

4.04

26

25.90

Globulol

C₁₅H₂₆O

1569

1569

3.09

nd

52.09

27

26.08

Viridiflorol

C₁₅H₂₆O

1575

1580

0.34

nd

nd

28

27.18

tau-Cadinol

C₁₅H₂₆O

1621

1625

10.56

nd

nd

29

28.99

β-santalol

C₁₅H₂₄O

1689

1689

-

nd

1.78

Total identified compounds

81.73

95.82

69.72

Non-oxygenated compounds

55.45

83.19

11.81

 Monoterpenes

51.91

80.48

-

 Sesquiterpenes

3.54

2.71

11.81

Oxygenated compounds

26.28

12.63

57.91

 Monoterpenes

3.94

0.66

-

 Sesquiterpenes

22.34

-

57.91

 Others

-

11.97

-