Peak    No. a   RI b Compounds Formula % Area c A B C Hydrocarbons 1 1031 α-Pinene C10H16 0.58 0.47 NA 2 1130 α-Phellandrene C10H16 0.57 0.46 NA 3 1166 β-Myrcene C10H16 2.22 1.71 NA 4 1213 Limonene C10H16 86.05 87.82 4.55 5 1278 p-Cymene C10H14 0.09 0.05 0.07 Oxides 9 1459 cis-Limonene oxide C10H16O 0.76 0.74 0.23 10 1471 trans-Limonene oxide C10H16O 0.48 0.40 NA 33 1838 cis-Carvone oxide C10H14O2 NA NA 1.52 35 1950 Limonene dioxide C10H16O2 NA NA 5.14 Alcohols 8 1447 1-Heptanol C7H16O 0.08 0.06 NA 13 1538 β-Linalool C10HO 1.07 0.73 0.32 15 1629 trans-p-Mentha-2,8-dienol C10H16O 0.89 0.43 1.82 16 1652 1-Nonanol C9H20O 0.14 0.12 0.14 17 1671 cis-p-Menth-2,8-dienol C10H16O 0.64 0.41 1.85 19 1698 α-Terpineol C10HO 0.11 0.21 NA 24 1832 Trans-carveol C10H16O 0.72 0.65 10.46 25 1863 cis-carveol C10H16O 0.56 0.91 2.49 26 2005 Perilla alcohol C10H16O 0.04 0.04 0.84 28 2333 Limonen-1,2-diol C10HO2 0.68 0.53 22.31 Aldehydes 6 1291 Octanal C8H16O 0.54 0.44 NA 7 1398 Nonanal C9H18O 0.13 0.10 0.18 11 1482 Citronellal C10H18O 0.04 0.12 NA 12 1503 Decanal C10H20O 0.80 0.63 0.33 18 1687 cis-Citral (Neral) C10H16O 0.19 0.34 0.81 20 1713 Dodecanal C12H24O 0.19 0.17 0.15 21 1735 trans-Citral (Gernial) C10H16O 0.03 0.15 NA 23 1753 β-Methylcrotonaldehyde C5H8O 0.12 0.92 0.77 29 1074 Hexanal C6H12O NA NA 0.10 38 2421 1,3,4-Trimethyl-3-cyclohexenyl-1-carboxaldehyde C10H16O NA NA 3.36 Ketones 22 1747 Carvone C10H14O 1.12 0.27 17.30 30 1563 Limona ketone C9H14O NA NA 0.35 31 1719 Umbellulone C10H14O NA NA 0.26 32 1777 p-Acetyltoluene C9H10O NA NA 0.99 34 1925 4-Hydroxy-3-methylacetophenone C9H10O2 NA NA 0.85 36 2128 Cyclooctanone C8H14O NA NA 3.15 37 2302 3-Isopropylidene-5-methyl-hex-4-en-2-one C10H16O NA NA 7.16 Acids 27 2089 Octanoic Acid C8H16O2 0.19 0.28 0.62 Esters 14 1538 Linalyl acetate C12H20O2 0.13 NA NA Unknowns 0.81 0.85 11.87

a Peak number labeled on TIC b Retention index relative to C8-C20 n-alkanes on Rtx®-Wax column cA: control sample; B: 2hr sunlight treated sample; C:  H2O added and sunlight treated 2hr sample

Table 2: Chemical compositional changes and relative intensity (%) of orange EO in photosensitive experiment analysis by GC-MS.