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Table 10 Chemical profiles of secondary metabolites in A. indica essential oils

From: Inhibitory effects of Azadirachta indica secondary metabolites formulated cosmetics on some infectious pathogens and oxidative stress radicals

S/N SM a KI b %composition MI c QA d MS data e MF*
LEO SBEO
1 α-Pinene 927 4.10 0.50 MSD, KI 99 79, 93,136 C10H16
2 Camphene 944 3.00 MSD, KI 97 93, 69,136 C10H16
3 Myrcene 970 5.60 t MSD, KI 99 41, 93, 69 C10H16
4 Limonene 1031 10.4 5.50 MSD, KI 98 68, 93, 79 C10H16
5 Terpinene 1063 2.70 13.70 MSD, KI 96 77, 93, 121 C10H16
6 Linalool oxide 1068 6.40 15.20 MSD, KI 99 91, 41, 43 C10H16
7 Linalool 1089 4.10 4.60 MSD, KI 95 44, 71,113 C10H18O
8 β-Curcumene 1120 7.81 MSD, KI 97 109,161, 43 C15H22
9 α-Cedrene 1129 2.20 t MSD, KI 91 93, 41, 204 C15H24
10 α –Cubebene 1369 1.60 3.00 MSD, KI 97 43, 68, 161 C15H24
11 γ-Elemene 1385 10.20 5.10 MSD, KI 99 43, 68, 204 C15H24
12 α- Caryophyllene 1415 30.30 8.30 MSD, KI 98 93, 41, 79 C15H24
13 Caryophyllene oxide 1545 2.40 5.10 MSD, KI 98 41, 79, 111 C15H24O
14 Ledol 1560 2.40 MSD, KI 96 93, 79, 133 C15H26O
15 Hexadecanoic acid 1968 5.40 10.20 MSD, KI 96 43, 60, 73 C16H32O2
16 Heptadecane 2030 2.40 2.30 MSD, KI 95 43, 60, 256 C17H36
17 Linoleic acid 2039 2.11 5.40 MSD, KI 98 73,265,279 C18H32O
18 Phytol 2045 9.12 MSD, KI 99 41,71, 123 C20H40O
19 Tetracosane 2105 1.32 MSD, KI 98 73, 43, 129 C24H50
% Total   98.91 99.45     
% Yield   0.72 0.58     
  1. aSecondary metabolites listed in order of elution from HB-5 column
  2. bRetention indices relative to C9 - C25 n-alkanes on column
  3. cmethods of identification (mass spectra data & KI = retention index)
  4. dQuality assurance of GC/MS library
  5. emass spectra data
  6. *molecular formula t < 0.03%, LEO = leaves essential oil, SBEO = stem bark essential