A new tropane alkaloid and other constituents of Erythroxylum rimosum (Erythroxylaceae) |
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Authors: | Erika M de O Ribeiro Luciano S Lima Jorge M David Ademir E do Vale Lucia MX Lopes Juceni P David |
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Institution: | 1. Instituto de Química, Universidade Federal da Bahia, 40170-290, Salvador, BA, Brazil;2. Instituto Federal da Bahia, Campus Porto Seguro, 45810-000, Porto Seguro, BA, Brazil;3. Faculdade de Farmácia, Universidade Federal da Bahia, 40170-290, Salvador, BA, Brazil;4. Instituto de Química de Araraquara, Universidade Estadual Paulista, 14801-970, Araraquara, SP, Brazil |
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Abstract: | A new tropane alkaloid, named the 7β-acetoxy-3β,6β-dibenzoyloxytropane (1), was isolated from a methanol extract of Erythroxylum rimosum O.E. Schulz leaves. Other known compounds were detected, including quercetin, kaempferol-3-O-α-l-arabinofuranoside, (+)-catechin, epicatechin, quercetin-3-O-α-arabinofuranoside, quercetin-3-O-α-arabinopyranoside, quercetin-3-O-β-arabinopyranoside, quercetin-3-β-glucopyranoside, kaempferol, quercetin-3-O-β-galactopyranoside, β-sitosterol, α-amyrin, β-amyrin, and the ester derivatives of these two amyrins. Compound 1 exhibited weak inhibition of acetylcholinesterase. Structural identification was performed using IR, ESIHRMS and one- and two-dimensional NMR data analyses and confirmed by comparison with literature data. |
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