EtOH extracts of the stems and leaves of Margaritopsis carrascoana were found to contain new flavonoids luteolin 7-O-{β-D-apiofuranosil-(1→6)-[β-Lrhamnopyranosyl-( 1→2)]-β-D-glucopyranosyl} (5) and luteolin 7-O-{α-L-rhamnopyranosyl-(1→6)-[β-L-rhamnopyranosyl- (1→2)]-β-D-glucopyranosyl} (6), in addition to the known dihydrodehydrodiconiferyl alcohol 4-O-b-D-glucopyranoside (1), luteolin 7-O-b-L-rhamnopyranosyl-(1→2)-β-D-glucopyranosyl (2), luteolin 7-O-[b-D-apiofuranosyl-(1→6)]-β-D-glucopyranoside (3), and chrysoeriol 7-O-[b-D-apiofuranosyl-(1→6)]-β-D-glucopyranoside (4). All isolated compounds presented higher antioxidant activities than the controls, BHT and quercetin, while the extract of the stems showed strong AChE inhibition.

Croton zehntneri Pax. & K. Hoffm. (Euphorbiaceae) is an aromatic plant native of the northeaster region of Brazil; and is popularly known as "canela de cunhã". The chemical composition of the essential oils from leaves, stalks and roots from three chemotypes of C. zehntneri obtained by hydrodistillation were analyzes by GC-MS. E-anethole, was the main component in the essential oils of all plants parts of che-motype 1. While the phenylpropanoids stragole, eugenol, Z-methyl isoeugenol and E-methyl isoeugenol were the major component in the essential oils of chemotypes 2 and 3, respectively. On TLC the essential oils and the major compounds showed an acetylcholine esterase inhibitory effect.

Croton zehntneri Pax. & K. Hoffm. (Euphorbiaceae) es una planta aromática nativa de la región nororiental de Brasil, y es popularmente conocido como "canela de cunhã". La composición química de los aceites esenciales de hojas, tallos y raíces de três quimiotipos de C. zehntneri obtenido mediante hidrodestilación fueron examinados por GC-MS. E-anetol, fue principal componente en los aceites esenciales de todas las partes de la planta de quimiotipo 1. Si bien la fenilpropanóides estragol, eugenol, Z-metil isoeugenol and E-metil isoeugenol fueron el componente principal en los aceites esenciales de quimiotipos 2 e 3, respectivamente. El TLC estos aceites esenciales y los principales compuestos mostraron una acetilcolina esterase efecto inhibitorio.

O presente trabalho descreve o isolamento de quatro triterpenos (taraxerol, ácido ursólico, ácido 3b,19a,23-triidroxiurs-12-en-28-óico e ácido 2a,3a,19a,23-tetraidroxiurs-12-en-28-óico) e um fitoesteróide (espinasterol), bem como a avaliação do potencial antimalárico (cepa NK-65 do Plasmodium berghei), larvicida (larvas do 4º instar do Aedes aegypti), anti-radicalar (2,2-difenil-1-picril-hidrazila, DPPH) e anticolinesterásico de extratos das folhas, cascas do caule e caule de Pouteria venosa (Mart.) Baehni. Todos os compostos isolados estão sendo descritos pela primeira vez nesta espécie e foram identificados com base na análise de dados espectrais (IV e RMN, incluindo APT e DEPT), bem como pela comparação com dados descritos na literatura.

This work describes the isolation of four triterpenes (taraxerol, ursolic acid, 3b,19a,23-trihydroxyurs-12-en-28-oic acid and 2a,3a,19a,23-tetrahydroxyurs-12-en-28-oic acid) and a phytosteroid (spinasterol), as well as a preliminary evaluation of antimalarial (NK-65 strains of Plasmodium berghei), larvicidal (4th instar of Aedes aegypti), anti-radicalar (2,2-diphenyl-1-pycryl-hydrazyl, DPPH) and anticholinesterase activities of Pouteria venosa (Mart.) Baehni extracts from leaves, stem barks and stems. All isolated compounds are being described for the first time in this species and were identified on basis of the spectral data (IR and NMR, including APT, DEPT), as well as by comparison with literature data.