Abstract
Hydrodistilled volatile oil obtained from the rhizomes of Curcuma oligantha Trimen var. lutea (Zingiberaceae) was analyzed by GC and GC - MS. The volatile oil was composed main ly of cinnamyl cinnamate (48.9%), n - hexanal (14.0%) and n - octadecane (10.1%). Among the ten monoterpenes (7.1%) present in the oil, the prominent one was β - pinene (2.8%) followed by α - pinene (1.6%) and terpinen - 4 - ol (1.6%). The oil contained sixteen sesquiterpen es (9.7%) comprising mainly ar - turmerone (3.0%), c a dinol (1.3%), eudesmol (1.2%) and bisabolol oxide (1.1%). The predominant constituents were the aromatic esters (54.4%) including cinnamyl cinnamate (48.9%) and benzyl benzoate (2.9%). The important alipha tic constituents were characterized as n - hexanal (14.0%), n - octadecane (10.1%) and isoamyl pyruvate (1.9%). About 25 components occurred in trace amounts in the oil. The volatile oil and ethanolic extract of the rhizomes showed significant antimicrobial ac tivity.
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