Potent α-glucosidase inhibitors purified from the red alga Grateloupia elliptica

The bromophenols, 2,4,6-tribromophenol and 2,4-dibromophenol, purified from Grateloupia elliptica effectively inhibited Saccharomyces cerevisiae and Bacillus stearothermophilus α-glucosidases, and moderately inhibited rat-intestinal sucrase and maltase as well. Both bromophenols exhibited mixed inhibition against S. cerevisiae α-glucosidase.