Revised structure of A53868A.

Abstract

A53868A is a novel phosphorus-containing antibiotic obtained by fermentation of Streptomyces luridus NRRL15.101 ; the product has a broad-spectrum antimicrobial activity1^The molecular formula of CnH22N3O5P(MW307) contains units of glycine, leucine, and C3H7NOSP ; mass spectral fragmentation observations and 1H