1. Tanake, H. et al, J. Antibiot.,1982, 35 272 (isol)
2. Wu, R.T. et al, J. Antibiot.,1982, 35 279 (struct)
3. Kondo, T. et al, Tetrahedron Lett.,1983, 24 3647 (synth, uv, pmr)
4. Beylin, V.G. et al, Tetrahedron Lett.,1983, 24 4793 (synth) Yuan, B.D. et al, J. Antibiot.,1985, 38 642 (props)
5. Kondo, T. et al, Tetrahedron,1986, 42 199 (synth)