Studies on the Chemical Constituents of Rutaceous Plants. XLVI. The Chemical Constituents of Xanthoxylum integrifoliolum (MERR.) MERR. (Fagara integrifoliola MERR.) II. Structural Establishment of Integriquinolone, a New Phenolic Quinolone

Abstract

The structure of integriquinolone (1), a new phenolic quinolone which was isolated from Xanthoxylum integrifoliolum (MERR.) MERR. (Fagara integrifoliola MERR.), was established as 6-hydroxy-4-methoxy-1-methyl-2-quinolone by synthesis of ethyl integriquinolone (2), 6-ethoxy-4-methoxy-1-methyl-2-quinolone.