Thirteen compounds, 3-O-acetyloleanolic acid (1), methyl 3,4-dihydroxy benzoate (2), lapachenol (3), tecomaquinone (4), tectoquinone (5), tectol (6), acetilated tectol (7), quercetin (8), luteolin (9), glucoluteolin (10), lippisidoquinone (11), taxifolin (12) and isolariciresinol (13), were isolated from ethanol extract of Lippia sidoides. Their structures were assigned unambiguously by a combination of 1D and 2D NMR, IR and EIMS spectral data analysis and comparison with the published data for structurally related compounds. In brazilian traditional medicine the aerial parts of this specie are used as anti-infective agent, particularly as antiseptic.

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Three olean (β-amyrenone, β-amyrin and maniladiol), three ursane (α-amyrinone, α-amyrin and breine) and four tirucallane (3-oxotirucalla-8,24-dien-21-óic acid, 3α-hydroxytirucalla-8,24-dien-21-oic acid, 3α-acetoxytirucalla-8,24-dien-21-oic acid and 3α-hydroxytirucalla-7,24-dien-21-oic acid) triterpenes were isolated from the oleoresin of Protium hebetatum Daly. The structures were established mainly by 13 C, 1D and 2D NMR spectroscopic analysis. The isolation of 3α-hydroxytirucalla-8,24dien-21-oic acid permitted correction of the chemical shift assignments of some of its carbon atoms.