The Chemical Composition of Single-Tree <i>Boswellia frereana</i> Resin Samples

Frankincense is an aromatic terpenoid oleo-gum resin produced by trees in the genus Boswellia. It has been used for medicinal and religious purposes millennia, today important component perfume aromatherapy. The of Boswellia frereana especially prized, found to contain a high proportion monoterpenes. However, previous studies have relied on commercial samples; this study, we characterize compositions essential oil DCM extract samples from 12 individual B trees. triterpenoid fraction was largely consistent between samples, with lupeol (14.7%-32.5%), ?-amyrin (13.0%-25.2%), 3- epi-lupeol (6.4%-14.2%), ?-amyrin (5.3%-8.0%) as primary constituents. showed more intersample diversity, but still represented single, variable chemotype characterized moderate level ?-thujene (14.5%-43.9%) varying, often significant, ?-pinene (3.0%-63.0%).