Antibiotics C-14919 E-1 and E-2 and process for their preparation

摘要

The invention relates to the antibiotics C-14919 E-1 and E-2, which have antimicrobial and cytostatic properties, and to a process for their preparation by culturing a strain of the genus Nocardia, preferably of the novel strain Nocardia No. C-14919, which produces these antibiotics. According to the invention, the antibiotic C-14919 E-1 is also prepared by oxidation of the antibiotic C-14919 E-2, and the antibiotic C-14919 E-2 is also prepared by reduction of the antibiotic C-14919 E-1.