1,3-diphenylquinoxalino [2,3-C] furan: a stable reactive diene
Makhluf J. Haddadin, Andre Yavrouian and Costas H. Issidorides
Tetrahedron Letters
Volume 11, Issue 17, 1970, Pages 1409-1401
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http://dx.doi.org/10.1016/S0040-4039(01)97982-1