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Abstract
The aim of this research was to determine for the first the chemical constituents of essential oils derived from the leaves, pseudostems and rhizomes of Alpinia strobiliformis T. L. Wu & S.J. Chen and Alpinia blepharocalyx K. Schum (syn. Alpinia roxburghii Sweet) grown in Vietnam. The oils obtained by hydrodistillation and investigated through gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS). The principal compounds in the leaves, pseudostems and rhizomes of A. strobiliformis were 1,8-cineole (25.5 %, 14.1 % and 16.5 %), β-pinene (10.7 %, 15.0 % and 12.5 %) and γ-terpinene (12.5 %, 11.0 % and 13.6 %). Fenchyl acetate (10.1 %) occurred in higher quantity in the rhizome. However, β-pinene (12.0 %, 10.4 % and 9.5 %), τ-muurolol (4.0 %, 9.5 % and 11.2 %) and α-cadinol (3.0 %, 9.5 % and 11.2 %) were the compounds common to the oils from the leaves, pseudostems and rhizomes of A. blepharocalyx. A large amount of (E,E)-α-farnesene (28.6 %) was found in the pseudostems, while δ-cadinene was found in the leaf (21.4 %) and rhizome (28.4 %) but absent in the pseudostems.