Dry leaves of C. citratus (DC.) Stapf, known as lemongrass, were
purchased from ERVITAL® (Mezio, Castro Daire, Portugal) in
July 2004 and kept at −20 °C until use. The plant was cultivated
in the region of Mezio, Castro D’Aire (Portugal).A voucher
specimen was deposited in the Herbarium of Aromatic and
Medicinal Plants of the Faculty of Pharmacy – University of
Coimbra (A. Figueirinha 0109). The identity of the plant was
confirmed by J. Paiva (Botany Department, University of Coimbra,
Portugal).