Stoffwechselprodukte von Mikroorganismen 226. Mitteilung Versuche zur Strukturaufklärung von Niphimycin, 3. Teil. Identität von Scopafungin mit Niphimycin I und Lage des Malonylrestes in Niphimycin und Copiamycin

Structural Elucidation of Niphimycin, Part 3. Identity of Scopafungin and Niphimycin I. Position of the Malonyl Residue of Niphimycin and Copiamycin The identity of scopafungin with niphimycin I was proven by spectroscopic and chromatographic methods and by common degradation products. The position of the malonyl residue in niphimycin I ( 9 ) and in copiamycin ( 14 ) was deduced by 1 H‐NMR spin‐decoupling experiments of a degradation product ( 10 ).