Four tetracyclic oxindole alkaloids and a taberpsychine derivative from a Malayan Tabernaemontana |
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| Authors: | Kuan-Hon Lim Kooi-Mow Sim Guan-Huat Tan Toh-Seok Kam |
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| Institution: | aDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia;bDepartment of Chemical Science, Faculty of Science, Engineering and Technology, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia |
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| Abstract: | Four tetracyclic oxindole alkaloids, 7(R)- and 7(S)-geissoschizol oxindole (1 and 2), 7(R),16(R)- and 7(S),16(R)–19(E)-isositsirikine oxindole (3 and 4), in addition to a taberpsychine derivative, N(4)-demethyltaberpsychine (5), were isolated from the Malayan Tabernaemontana corymbosa and the structures were established using NMR and MS analysis. |
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| Keywords: | Oxindole alkaloids Tabernaemontana NMR Plants |
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