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Chemical structure of rhamnan sulfate (RS) extracted from Monostroma nitidum. RS is a polysaccharide composed of linear chains of l-rhamnose (α-1,3 linkages) with branched chains (α-1,2 linkages), to which several sulfate groups are bound; reproduced from Tako et al. [7]. Reproduced with permission from SinencePG, 2020.
