Volatile Constituents of Piperaceae from Santa Catarina, Brazil—Essential Oil Composition ofPiper cernuumVell. andPeperomia emarginella(Sw.) C. DC.

Abstract
The essential oil composition of two Piperaceae from the Itajaí Valley in Santa Catarina, Brazil, is described by means of GC and GC/MS analysis. Piper cernuum provided an oil constituted mainly by α-pinene (2.5%), β-elemene (2.6%), β-caryophyllene (4.4%), germacrene D (2.7%), β-dihydroagarofuran (31.0%), elemol (12.0%), 10-epi-γ- eudesmol (13.0%) and β-eudesmol (2.6%). Twenty-eight compounds representing 87.8% of the oil were identified. Peperomia emarginella provided the most interesting oil due to its pleasant and intense odor, where limonene (29.0%) and decanal (33.0%) accounted for 62.0% of the overall composition. Thirty-one compounds representing 94.4% of the oil composition were identified.