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A supposed benzoxete is determined as a complex polycyclic system: cis,cis,cis-5 aH,10 aH,15 aH-tribenzo[b,f,j][1,4,7]trioxa[9 b]azaplienalene. The structure elucidation is performed by spectroscopycal methods (IR,  1 H NMR,  13  C NMR and mass spectroscopy) and by degradation reactions in an acidic or an alkaline medium.

zeitschrift für naturforschung b

5aH.10aH.15aH-Tribenzo [b.f.j] [1.4.7] trioxa [9 b] azaphenalene - vermeintliche Benzoxete / 5aH, 10aH, 15aH-Tribenzo[b,f,j][l,4,7]trioxa[9 b]azaphenalenes - Supposed Benzoxetes