Studies on the Metabolic Products of Macrosporium porri Elliott

Part II. Structure of Macrosporin (Group I)

Abstract

Macrosporin C₁₆H₁₂O₅, a metabolic product of Macrosporium porri Elliott, has been proved to be mono-methyl-mono-methoxy-di-hydroxy-anthraquinone, owing to the fact that macrosporin monomethylether was oxidized with CrO₃ to 5-netgtk 4-methoxy phthalic acid.