.beta.-D-threo-D-glycero-3-Hexulofuranosonic acid, 2-C-[(2,3-dibromo-4,5-dihydroxyphenyl)methyl],.gamma.-lactone 100676-10-6 Furo[3,2-b]furan, .beta.-D-threo-d-glycero-3-hexulo furanosonic acid deriv. (9CI) (+)-Rhodomelol NSC615490 Rhodomelol, from the red alga Polysiphonia lanosa