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Whitening and antioxidant activities of bornyl acetate and nezukol fractionated from Cryptomeria japonica essential oil

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Synopsis
Objectives

The aim of this study was to investigate the whitening and antioxidant activities of essential oils from Cryptomeria japonica by determining their tyrosinase inhibition, 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) radical scavenging and superoxide dismutase (SOD)‐like activities.
Methods

Essential oils of C.┬ájaponica leaves were extracted with distilled water, and after condensation of volatile constituents, the condensates were extracted with ethyl acetate. Crude essential oils of C.┬ájaponica were divided into six fractions by thin layer chromatography and open column chromatography, and their chemical analysis was performed by GC/MS. Major compounds of fractions were composed of kaurene, bornyl acetate, nezukol, (‐)‐4‐terpineol, δ‐cadinene, α‐terpineol, γ‐eudesmol, α‐eudesmol and elemol.
Results

For tyrosinase inhibitory activity using two substrates, l‐tyrosine and 3,4‐dihydroxyphenylalanine (l‐DOPA), kaurene, bornyl acetate and nezukol were highly effective. In antioxidant activity, (‐)‐4‐terpinenol and δ‐cadinene showed high DPPH radical scavenging activity, and bornyl acetate and nezukol indicated extremely high SOD‐like activity.
Conclusion

Therefore, bornyl acetate and nezukol fractionated from C. japonica essential oil, which showed highly active whitening and antioxidant activities, have potential applications in cosmeceutical materials.
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Language: French

Document Type: Research Article

Publication date: October 1, 2013

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