Trans β ionone

Standard 2‐hexanone, hexanal, 1H‐1‐ethyl‐pyrrole, 2‐hexenal, cis‐3‐hexen‐1‐ol, heptanal, 6‐methyl‐5‐hepten‐2‐one, 2‐pentyl‐furan, 2‐ethyl‐1‐hexanol, benzeneacetaldehyde, cis‐linalool oxide, trans‐linalool oxide, linalool, 3‐octen‐2‐ol, phenylethyl alcohol, menthol, α‐terpineol, safranal, decanal, camphene, geraniol and indole were purchased from Sigma Co. Ltd. Benzyl alcohol, trans‐β‐damascenone, trans‐α‐ionone, cis‐geranylacetone, trans‐β‐ionone, 2,4‐ditert‐butylphenol, cedrol, and caryophyllene oxide were purchased from Alfa Aesar Co. Ltd. Standard chemical series of C₈–C₂₀ alkanes that were used to determine the liner retention index (RI) and the internal standard cyclohexanone were obtained from Sigma Co. Ltd. Cis‐pyranoid‐linalool oxide and trans‐pyranoid‐linalool oxide were purchased from Sinopharm Chemical Reagent Co. Ltd.

The standards 2-hexanone, benzeneacetaldehyde, linalool, linalool oxides, phenylethyl alcohol, 4-oxoisophorone, menthol, α-terpineol, safranal, geraniol, indole, and 2-ethyl-3-methylpyrazine were purchased from Sigma-Aldrich Co., Ltd. (St. Louis, MO, USA). The standards, 1-ethylpyrrole, benzyl alcohol, 1,2-dimethoxybenzene, 3,4-dimethoxytoluene, 1,2,3-trimethoxybenzene, 1,2,4-trimethoxybenzene, trans-β-ionone, 2,4-ditert- butylphenol, and dihydroactinidiolide were obtained from Alfa Aesar Co., Ltd. (Heysham, Lancashire, UK). A standard series of C₈–C₂₀ alkanes were used for retention index (RI) determination, and the internal standard cyclohexanone were purchased from Sigma-Aldrich Co., Ltd. (St. Louis, Mo, USA). Other reagents were all of analytical grade and obtained from Sinopharm Chemical Reagent Co., Ltd. (Shanghai, China).

Standard 2-hexanone, 1H-1-ethyl-pyrrole, benzeneacetaldehyde, cis-linalool oxide, trans-linalool oxide, linalool, 3-octen-2-ol, phenylethyl alcohol, α-terpineol, safranal, camphene, geraniol, indole, 3-hexanol, hexanal, 1-octanol and 2,5-dimethylpyrazine were purchased from Sigma Co. Ltd. (St. Louis, MO, USA). Benzyl alcohol, trans-β-damascenone, trans-β-ionone, 2, 4-ditert-butylphenol, cedrol and caryophyllene oxide were purchased from Alfa Aesar Co. Ltd. (Heysham, Lancashire, UK). Standard chemical series of C₈-C₂₀ alkanes that were used to determine the liner retention index (RI) and the internal standard (Cyclohexanone) were obtained from Sigma Co. Ltd. (St. Louis, MO, USA). The other chemicals were purchased from Sinopharm Chemical Reagent Co. Ltd. (Shanghai, China).