FR901228, a novel antitumor bicyclic depsipeptide produced by Chromobacterium violaceum No. 968. II. Structure determination.

The structure of FR901228 (C 24 H 36 N 4 O 6 S 2 ), including stereochemical details, was determined by a combination of spectroscopic, chemical evidence and single-crystal X-ray crystallographic analysis using anomalous dispersion from the S atoms