Abstract: The oxoaporphine alkaloid lysicamine (1), and three proaporphine alkaloids, litsericinone (2), 8,9,11,12-tetrahydromecambrine (3) and hexahydromecambrine A (4) were isolated from the leaves of Phoebe grandis (Nees) Merr. (Lauraceae). Compounds 2 and 3 were first time isolated as new naturally occurring compounds from plants. The NMR data for the compounds 2–4 have never been reported so far. Compounds 1 and 2 showed significant cytotoxic activity against a MCF7 (human estrogen receptor (ER+) positive breast cancer) cell line with IC50 values of 26 and 60 µg/mL, respectively. Furthermore, in vitro cytotoxic activity against HepG2 (human liver cancer) cell line was evaluated for compounds 1–4 with IC50 values of 27, 14, 81 and 20 µg/mL, respectively. Lysicamine (1) displayed strong antibacterial activity against Bacillus subtilis (B145), Staphylococcus aureus (S1434) and Staphylococus epidermidis (a clinically isolated strain) with inhibition zones of 15.50 ± 0.57, 13.33 ± 0.57 and 12.00 ± 0.00 mm, respectively. However, none of the tested pathogenic bacteria were susceptible towards compounds 2 and 3.
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Omar, H.; Hashim, N.M.; Zajmi, A.; Nordin, N.; Abdelwahab, S.I.; Azizan, A.H.S.; Hadi, A.H.A.; Ali, H.M. Aporphine Alkaloids from the Leaves of Phoebe grandis (Nees) Mer. (Lauraceae) and Their Cytotoxic and Antibacterial Activities. Molecules 2013, 18, 8994-9009.
Omar H, Hashim NM, Zajmi A, Nordin N, Abdelwahab SI, Azizan AHS, Hadi AHA, Ali HM. Aporphine Alkaloids from the Leaves of Phoebe grandis (Nees) Mer. (Lauraceae) and Their Cytotoxic and Antibacterial Activities. Molecules. 2013; 18(8):8994-9009.
Omar, Hanita; Hashim, Najihah M.; Zajmi, Asdren; Nordin, Noraziah; Abdelwahab, Siddiq I.; Azizan, Ainnul H.S.; Hadi, A. H.A.; Ali, Hapipah M. 2013. "Aporphine Alkaloids from the Leaves of Phoebe grandis (Nees) Mer. (Lauraceae) and Their Cytotoxic and Antibacterial Activities." Molecules 18, no. 8: 8994-9009.