Comparative Phytochemical Analyses of Resins of Boswellia Species (B. papyrifera (Del.) Hochst., B. neglecta S. Moore, and B. rivae Engl.) from Northwestern, Southern, and Southeastern Ethiopia

Table 3

Chemical compositions (%) of essential oils of three of B.  rivae resins.

Retention time (min)	Components	Dolo Odo	Filtu	Chereti*
		%	%	%
6.4	α-Thujene	10.0	2.3	1.7
6.7	α-Pinene	66.2	37.3	32.5
7.8	o-Cymene	2.6	5.6	3.0
9.1	Δ-3-Carene	0.7	6.7	6.2
9.5	p-Cymene	5.7	9.8	21.1
9.7	Limonene	1.1	9.7	19.6
13.4	𝛼-Campholene aldehyde	1.8	1.5	1.6
13.6	trans-Verbenol	2.9	2.9	1.7

∗Components identified from the essential oil of same sample reported in our previous study [13].