New Chromone Alkaloids from the Stem Bark ofSchumanniophyton magnificum

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Abstract
Fractionation of a methanolic extract of the stem bark of Schumanniophyton magnificum yielded large quantities of mannitol. In addition, noreugenin and ten related chromone alkaloids were isolated. Seven of these alkaloids had been isolated previously from S. magnificum and one other from S.problematicum but two of the alkaloids were novel, one was hydroxy-N-methylschumannificine and the other was the acetate of N-demethylrohitukine. The structures of the two alkaloids have been deduced from their spectral features.