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Summary: REFERENCES AND NOTES
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1. M. B. Sporn and D. L. Newton, Fed. Proc. 38, 2528
(1979).
2. T. Kudo, T. Narisawa, S. Abo, Gann 71, 260 (1980);
M. Pollard, P. H. Luckert, M. A. Schmidt, Cancer
Lett. 21, 57 (1983); W. R. Waddell, G. R. Ganser, E.
J. Cerise, R. W. Loughry, Am. J. Surg. 157, 175
(1989); M. J. Thun, M. M. Namboodiri, C. W. Heath,
N. Engl. J. Med. 325, 1593 (1991).
3. O. J. Plescia, A. H. Smith, K. Grinwich, Proc. Natl.
Acad. Sci. U.S.A. 72, 1848 (1975); J. S. Goodwin,
Am. J. Med. 77, 7 (1984).
4. T. V. Zenser et al., J. Pharmacol. Exp. Ther. 227, 545
(1983); D. Wild and G. H. Degan, Carcinogenesis 8,
541 (1987).
5. Roots of C. quinquangulata Rich. (Leguminosae)
were collected in Peru in 1974. The dried ground
plant material (1 kg) was extracted twice overnight
with methanol at room temperature, followed by
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