ABSTRACTThe first chemical and enantioselective analyses of the essential oil from the leaves of Mauria heterophylla Kunth were carried out. The dry plant materialproduced an essential oil with a 0.09 ± 0.05% yield by weight. The volatile fraction was submitted to GC-MS (qualitative) and GC-FID (quantitative) analyses, on two different stationary phases. A total of forty-four constituents were detected and quantified with at least one column, corresponding to about 85.5% of the whole oil mass. Limonene (15.2%), (E)-β-caryophyllene (11.1%), α-phellandrene (10.9%), germacrene D (6.6%), α-pinene (6.4%), myrcene (3.9%), β-phellandrene (2.8%), bicyclogermacrene (2.8%), (E)-β-farnesene (2.2%) and δ-cadinene (1.2%) were major components. Furthermore, the study was complemented with the enantioselective analysis of eleven common chiral terpenes, carried out on two β-cyclodextrin-based chiral selectors. Among the chiral metabolites, (1R,4S)-(+)-camphene, (1R,5R)-(+)-β-pinene, (S)-(+)-α-phellandrene and (S)-(+)-β-phellandrene were enantiomerically pure, whereas α-pinene, sabinene, limonene, linalool, terpinen-4-ol, α-terpineol and germacrene D were present as scalemic mixtures.KEYWORDS: Mauria heterophyllagas chromatographymass spectrometryenantiomersβ-cyclodextrinEcuador Disclosure statementNo potential conflict of interest was reported by the author(s).