Fig. 3

Representative examples of the volatile organic compounds (VOCs) identified on chromatograms in the GC–MS analysis. Thirteen volatile organic compounds were identified in both the cedarwood and resin huts. The peaks of γ-cadinene and γ-muurolene were superimposed. Each peak area of the 13 identified main sesquiterpene compounds per peak area of the internal standard was approx. twice as large in the cedarwood hut compared to the resin hut