LL-F28249 antibiotic complex: A new family of antiparastic macrocyclic lactones. Isolation, characterization and structures of LL-F28249 .ALPHA., .BETA., .GAMMA., .LAMBDA..

Abstract
A new family of antiparasitic macrolides has been isoalted from Streptomyces cyaneogriseus ssp. noncyanogenus. the compounds, designated LL-F28249 .alpha., .beta., .gamma. and .lambda., possess potent antiparasitic activity. The isolation, purification and structure determination by spectroscopic methods are presented.