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Table 1 Chemical constituents of essential oil of Plectranthus glandulosus leaf

From: Effectiveness of binary combinations of Plectranthus glandulosus leaf powder and Hymenocardia acida wood ash against Sitophilus zeamais (Coleoptera: Curculionidae)

Compounds % Composition
Hydrocarbonated monoterpenes  
1R-α-Pinene 11.2
β-Pinene 11.5
(+)-4-Carene 0.3
3-Carene 8.7
β-Phellandrene Tr
Paracymene 7.5
Limonene 2.5
γ-Terpinene 0.1
β-Thujene 0.2
2-Methyladamantane 0.8
(E)-β-Ocimene 0.3
(E)-4,8-Dimethyl-1,3,7-nonatriene Tr
α-Terpinene 1.3
β-Myrcene 9.7
Hydrocarbonated sesquiterpenes  
7-β-[H]-silphiperfol-5-ene 1.2
Silphin-1-ene Tr
Silphiperfola-5,7(14)-diene 0.1
α-Copaene 2.7
Pethybrene 0.3
Modhephene 0.3
α-Isocomene 0.2
α-Curcumene 0.2
γ-Gurjumene Tr
(Z,E)-α-Farnesene 2.5
β-Selinene 0.1
Oxygenated monoterpenes  
α-Terpineol 10.8
O-Acetylthymol 0.8
Thymol 10.1
(E,E)-2,4-Decadienal 0.1
8,9-Dihydrothymol Tr
Bornyl acetate Tr
Neryl acetate 0.3
α-Terpenyle 0.1
(E)-β-Damascenone 0.4
β-Cyclocitral 0.1
4′-Methoxyvalerophenone Tr
p-Methoxycumene Tr
Oxygenated sesquiterpenes  
Cubebol Tr
β-Caryophyllene oxide 9.4
β-Oplopenone Tr
Aromatic compounds  
3,4-Xylenol Tr
2-(2-Butynyl)-cyclohexanone 0.1
Acetophenone 5.5
Aldehydes  
(E)-2-Nonanal 0.1
Undecanal 0.2
Decanal 0.1
Lauraldehyde 0.1
(E)-2-Decenal 0.1
Nonenal 0.3
Ketones  
Decan-2-one Tr
Tridecan-2-one Tr
Ester  
cis-hex-3-enyl-acetate 0.5
  1. Tr in trace (< 0.1)