Pseudophomins A and B, a class of cyclic lipodepsipeptides isolated from a Pseudomonas species.

The crystal structures of pseudophomins A and B, with primary structures beta-hydroxydecanoyl-L-Leu-D-Glu-D-allo-Thr-D-Ile-D-Leu-D-Ser-L-Leu-D-Ser-L-Ile monohydrate, C(55)H(97)N(9)O(16).H(2)O, and beta-hydroxydodecanoyl-L-Leu-D-Glu-D-allo-Thr-D-Ile-D-Leu-D-Ser-L-Leu-D-Ser-L-Ile monohydrate, C(57)H(101)N(9)O(16).H(2)O, new cyclic lipodepsipeptides isolated from Pseudomonas fluorescens strain BRG100, have been solved. The absolute configuration of pseudophomin A has been determined from anomalous dispersion and the stereochemistry of the beta-hydroxy acid group is R.