Lupane Pentacyclic Triterpenes Isolated from Stems and Branches of Maytenus imbricata (Celastraceae)

Lupane Pentacyclic Triterpenes Isolated from Stems and Branches of Maytenus imbricata (Celastraceae)

Four lupane pentacyclic triterpenes were isolated from the hexane extract of stems and branches of Maytenus imbricata Mart. ex Reissek: 3‐oxolup‐20(30)‐en‐29‐al (1), 30‐hydroxylup‐20(29)‐en‐3‐one (2), (11α)‐11‐hydroxylup‐20(29)‐en‐3‐one (3), and (3β)‐lup‐20(30)‐ene‐3,29‐diol (4). The structural iden...

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Veröffentlicht in:Helvetica chimica acta 2005-05, Vol.88 (5), p.1102-1109
Hauptverfasser: Ribeiro de Souza e Silva, Silvia, de Fátima Silva, Gracia Divina, de Almeida Barbosa, Luca Cláudio, Duarte, Lucienir Pains, Filho, Sidney Augusto Vieira
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Sprache:eng
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Zusammenfassung:Four lupane pentacyclic triterpenes were isolated from the hexane extract of stems and branches of Maytenus imbricata Mart. ex Reissek: 3‐oxolup‐20(30)‐en‐29‐al (1), 30‐hydroxylup‐20(29)‐en‐3‐one (2), (11α)‐11‐hydroxylup‐20(29)‐en‐3‐one (3), and (3β)‐lup‐20(30)‐ene‐3,29‐diol (4). The structural identification of 1–4 was achieved by 1H‐ and 13C‐NMR techniques, including 2D experiments (HSQC, HMBC, and NOESY).
ISSN:0018-019X
1522-2675
DOI:10.1002/hlca.200590081