Constituents of Eupomatia species. IX. N.M.R. evidence for the structure of eupolauramine and hydroxyeupolauramine

Abstract

The ¹H and ¹³C n.m.r. spectra of eupolauramine, 6-methoxy-5-methylbenzo[h]pyrrolo[4,3,2-de]-quinolin-4(5H)-one (3), have been assigned. Hydroxyeupolauramine was shown to be the 10-hydroxy derivative (4). The biogenesis of eupolauramine and eupolauridine (2) is discussed.