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The North American commercial incense copals are derived from species of Bursera, Protium (Burseraceae), and Hymenaea (Caesal-piniaceae) but are also distinguished by the technique of harvesting as well as by species. Sixty-eight compounds were identified in three commercial incense copals. The essential oil of copal bianco (probably from B. bipinnata) is dominated by 14.52 ± 1.28% α-copaene and 13...
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