Abstract
Candidin, the antifungal antibiotic produced by Streptomycesviridoflavus, has been isolated in crystalline form. Analyses and equivalent weight values best fit a molecular formula C46H75NO17. The substance is amphoteric and probably contains one carboxyl and one amino group. Infrared spectral evidence also indicates a polyhydroxylated structure, and the absorption in the visible region shows the presence of a conjugated heptaene chromophore. An additional conjugated diene elsewhere in the molecule is suggested by hydrogenation values and the absorption maximum at 228 mμ.
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