Three new macrolides, micromonospolides A-C, have been isolated from a new
species of the genus Micromonospora and their structures were elucidated to
be bafilomycin-type macrolides which have a 16-membered lactone ring on th
e basis of spectroscopic data. Micromonospolides A-C inhibited gastrulation
of starfish embryos at minimum inhibitory concentrations of 0.010, 0.011 a
nd 1.6 mug mL(-1) respectively. (C) 2001 Elsevier Science Ltd. All rights r
eserved.