title: FK228 from Burkholderia thailandensis MSMB43.
abstract: FK228 [systematic name: (1S,4S,7Z,10S,16E,21R)-7-ethyl-idene-4,21-di(propan-2-yl)-2-oxa-12,13-dithia-5,8,20,23-tetra-za--bicyclo[8.7.6]tricos-16-ene-3,6,9,19,22-pentone], C(24)H(36)N(4)O(6)S(2), also known as FR901228, depsipeptide, NSC 630176, romidepsin, and marketed as Istodax by Celgene Corporation, is crystallized from ethyl acetate in P2(1) as compared to the absolute configuration of FK228, first crystallized from methanol in P2(1)2(1)2(1) [Shigematsu et al. (1994 ▶). J. Anti-biot.47, 311-314]. A slight difference is observed between the absolute configuration of FK228 and the present structure. The molecular structure is stabilized by intramolecular N-H⋯O hydrogen bonds. In the crystal, molecules are linked via N-H⋯O hydrogen bonds.
authors.affiliation: Department of Biological Sciences, Department of Chemistry and Biochemistry, Univeristy of Wisconsin-Milwaukee, PO Box 413, Milwaukee, WI 53201,  USA.
authors.forename: Xiang-Yang
authors.initials: XY
authors.lastname: Liu
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Yi-Qiang
authors.initials: YQ
authors.lastname: Cheng