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1) W. Takada, T. Sakata, S. Shimano, Y. Enami, N. Mori, R.

Nishida, Y. Kuwahara, J. Chem. Ecol., 31, 2403῎2415 (2005).

2) R. A. Saporito, M. A. Donnelly, R. A. Norton, H. M. Gar- ra#o, T. F. Spande, J. W. Daly,Proc. Natl. Acad. Sci. U.S.

A.,104, 8885῎8890 (2007).

3) 0123 pq456*,lEFm200978m i9 rk

4) A. Bernardi, G. Colombo and C. Scolastico,Tetrahedron Lett.,49, 8921῎8924 (1996).

5) pq450123:; <=20stu>v?Fm 7wm ix@k

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