New Insights Into the Chemical Composition of Baccharis palustris Heering (Asteraceae) Essential Oil

Abstract

B. palustris Heering (Asteraceae), has been previously characterized as having an unusual essential oil composition with C9-/C10-polyacetylenes as main components, and mono-and sesquiterpenes/terpenoids at minor or trace levels. In this work, new insights into the chemical composition of this oil are presented: 1. TLC profiles using different visualization reagents for their characterization, 2. chemical analyses combining HRGC/qMS, HRGC/HRMS-TOF and HRGCxHRGC/HRMS-TOF, and 3. radical scavenging activity assay using the DPPH methodology were performed. The best TLC visualization conditions for the polyacetylenic components of the oil were obtaining using UVλ= 365 nm and vanillin/H3PO4, HIGHLIGHTS •TLC profiles of B. palustris essential oil with different visualization reagents.• Original application of HRGCxHRGC/HRMS-TOF to a Baccharis spp. essential oil. •Ten unreported terpenoids and lachnophyllum lactone identified in B. palustris oil.• B. palustris oil did not exhibit DPPH radical scavenging activity.• .