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Abstract
The volatiles of the leaves, stems and flowers of Otacanthus azureus were obtained by hydrodistillation and analyzed by GC and GC/MS. The oils of O. azureus were terpenoid in nature. Among the monoterpenes trans-pinocarveol was the major component (leaves: 14.8%, stems: 7.0%, flowers: 2.2%). β-Copaen-4α-ol was the main sesquiterpene found (leaves: 15.6%, stems: 24.3%, flowers 27.4%).