Cell-adhesion inhibitors produced by a sea hare-derived Periconia sp II -: Absolute stereostructures of peribysins H and I

Peribysins H (1) and 1 (2) have been isolated from a strain of Periconia byssoides originally separated from the sea hare Aplysia kurodai. Their absolute stereo structures have been elucidated on the basis of spectroscopic analyses using 1D and 2D NMR techniques and some chemical transformations including the modified Mosher's method. These metabolites inhibited the adhesion of human-leukemia HL-60 cells to HUVEC.