Author/Authors :
Bubenik، نويسنده , , Monica P. and Bridson، نويسنده , , John N. and Miller، نويسنده , , David O. and Jean Burnell، نويسنده , , D.، نويسنده ,
Abstract :
The major products from the exposure of tetracyclic keto-alcohol 1 to excess 1,4-naphthoquinone in the presence of acid were a hexacyclic quinone (6) and a heptacyclic dihydrobenzofuran derivative (8).