A new 34-membered macrolide antibiotic, colubricidin A (1), was isolated fr
om the fermentation broth of a new streptomyces species. Its structure was
elucidated on the basis of analysis of the spectroscopic data and chemical
degradation. It was identified as a glycomacrolide with an unprecedented ar
omatic chromophore. Colubricidin A showed excellent activity against Gram-p
ositive bacteria. (C) 1999 Elsevier Science Ltd. All rights reserved.