Clavamycins, new clavam antibiotics from two variants of Streptomyces hygroscopicus. I. Taxonomy of the producing organisms, fermentation, and biological activities.

Abstract
In a selective screening for antifungal metabolite, six new clavam antibiotics, clavamycins A, B, C, D, E and F, have been detected from two variants of Streptomyces hygroscopicus NRRL 15846 and NRRL 15879.