Bioassay guided isolation of the methanolic extract of marine macro brown alga afforded one new metabolite (ethyl methyl 2-bromobenzene 1,4-dioate, ), one new natural metabolite (diethyl-2-bromobenzene 1,4-dioate, ) along with six known metabolites (-) reported for the first time from this source. The structure elucidation of all these compounds was achieved by extensive spectroscopic techniques including 1D (H and C) and 2D (NOESY, COSY, HMBC and HSQC) NMR and mass spectrometry and comparison of the spectral data of known compounds with those reported in literature. The in vitro α-glucosidase inhibition studies confirmed compound to be the most active against α-glucosidase enzyme with IC value of 30.
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