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Dr. Duke's Phytochemical and Ethnobotanical Databases
U.S. Department of Agriculture
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MDR-Inhibitor

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List of activity chemicals.
Click on column headings to sort table by that column. *Unless otherwise noted all references are to (Duke, 1992)
Chemical Name Dosage Reference
(+)-CEPHARANTHINE IC50=2.06 uM *
(+)-CEPHARANTHINE 1 ug/mL Hotta,T., Tanimura,H., Yamaue,H., Iwahashi,M., Tani,M., Tsunoda,T., Tamami,M., Moguchi,K., Mizobata,S., Arii,K., Teraswa,H. 1997. Modulation of Multidrug Resistance by Cepharanthine in Fresh Human Gastrointestinal Tumor Cells. Oncology, 54(2): 153-157.
10-DEACETYLBACCATIN-III 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
11-METHOXY-KOPSILONGINE IC50=1.6 ug/ml Kam, T. S., Subramaniam, G., Sim, K. M., Yoganathan, K., Koyano, T., Toyoshima, M., Rho, M. C., Hayashi, M., Komiyama, K. 1998. Reversal of Multidrug Resistance (MDR) by Aspidofractinine-Type Indole Alkaloids. Bioorg. Med. Chem. Lett., 8: 2769-2772.
12-METHOXY-PLEIOCARPINE IC50=21 ug/ml Kam, T. S., Subramaniam, G., Sim, K. M., Yoganathan, K., Koyano, T., Toyoshima, M., Rho, M. C., Hayashi, M., Komiyama, K. 1998. Reversal of Multidrug Resistance (MDR) by Aspidofractinine-Type Indole Alkaloids. Bioorg. Med. Chem. Lett., 8: 2769-2772.
13-ACETYL-BREVIFOLIOL 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
19-ACETYL-19-DEBENZOYLTAXININE-M 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
1BETA-HYDROXYBACCATIN-1 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
2',7-DIDEACETOXYAUSTROSPICATINE 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
2,9-DIDEACETYLTAXININE 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
2-DEACETOXYAUSTROSPICATINE 1 ug/mL Kobayashi, J., et al. 1994. Taxuspines A-C, New Taxoids From Japanese New Taxus cuspidata Inhibiting Drug Transport Activityof P-Glycoprotein in Multidrug-Resistant Cells. Tetrahedron, 50(25): 7401-7416.
2-DEACETOXYTAXININE-E 10 ug/ml *
2-DEACETOXYTAXININE-J 1 ug/mL Kobayashi, J., et al. 1994. Taxuspines A-C, New Taxoids From Japanese New Taxus cuspidata Inhibiting Drug Transport Activityof P-Glycoprotein in Multidrug-Resistant Cells. Tetrahedron, 50(25): 7401-7416.
2-DEACETYL-5-DECINNAMOYLTAXININE-J 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
2-DEACETYLTAXININE-J 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
2-DECINNAMOYLTAXININE-J 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
5'-METHOXYHYDNOCARPIN Stermitz, F. R., Lorenz, P., Tawara, J. N., Zenewicz, L. A., Lewis, K. 2000. Synergy in a medicinal plant: antimicrobial action of berberine potentiated by 5'-methoxyhydnocarpin, a multidrug pump inhibitor. Proc Natl Acad Sci USA, 97(4): 1433-1437.
5-N-ACETYLARDEEMIN 10 uM Karwowski, J. P., et al. 1993. 5-n-acetylkardeemin, a Novel Heterocyclic Compound Which Reverses Multiple Drug Resistance in Tumor Cells I. Taxonomy and Fermentation of the Producing Organism and Biological Activity. J Antibiot, 46(3): 374-379.
7-EPITAXOL 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
7-O-ACETYLTAXINE-A 1 ug/mL Kobayashi, J., et al. 1997. Effects of Taxoids From Taxus cuspidata on Microtubule Depolymerization and Vincristine Accumulation in MDR Cells. Bioorg. Med. Chem. Lett., 7: 393-398.
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List of Activity Plants.
Click on column headings to sort table by that column.
Plant Name Common Name Chemical Count Total Parts Per Million
Stauracanthus genistoides 1 0
Stellaria media Chickweed; Common Chickweed 1 0
Stizolobium deeringianum 1 0
Strongylodon macrobotrys 1 8
Taxus baccata Common Yew 2 0
Taxus cuspidata Yew 3 0
Taxus yunnanensis Yunnan Yew 1 241
Teline sp 1 0
Teucrium botrys Field Germander 1 0
Teucrium chamaedrys Wall Germander 1 0
Teucrium montanum Mountain Germander 1 0
Teyleria koordersii 1 10
Thermopsis fabacea 1 0
Thermopsis sp 1 0
Trifolium alexandrinum 1 0
Trifolium brachycalycinum 1 12, 900
Trifolium hybridum 1 0
Trifolium pratense Red Clover; Purple Clover; Peavine Clover; Cowgrass 1 456
Trifolium repens 1 0
Trifolium sp 1 0