Lupane Pentacyclic Triterpenes Isolated from Stems and Branches of Maytenus imbricata (Celastraceae) |
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| Authors: | Silvia Ribeiro de&#x;Souza&#x;e&#x;Silva Gracia&#x;Divina de&#x;Ftima&#x;Silva Luca&#x;Cludio de&#x;Almeida&#x;Barbosa Lucienir&#x;Pains Duarte Sidney&#x;Augusto&#x;Vieira Filho |
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| Institution: | Silvia Ribeiro de?Souza?e?Silva,Gracia?Divina de?Fátima?Silva,Luca?Cláudio de?Almeida?Barbosa,Lucienir?Pains Duarte,Sidney?Augusto?Vieira Filho |
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| Abstract: | 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). |
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