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The oligosaccharide fraction obtained by hydrolysis of phytoglycolipid from corn has been separated on Dowex-2 (HC03 ~) into a series of oligosaccharides of progressively increasing molecular weight. The first number of the series is the trisaccharide, glucosaminido-glucuronido-inositol. This trisaccharide is obtained by mild acid hydrolysis of all the higher oligosaccharides and accounts essentially quantitatively for their glucosamine and glucuronic acid content. The tetrasaccharide fraction was characterized by preparation of crystalline derivatives and was shown to contain only mannose (in addition to trisaccharide). The higher oligosaccharide fractions contained, in addition, varying amounts of galactose, arabinose, and fucose.The penta-, hexa-, hepta-, and octasaccharide fractions were in each case mixtures from which no single constituent was separated.In previous publications (Carter et al., 1958b(Carter et al., , 1962(Carter et al., , 1964 evidence has been presented for the following partial structure for phytoglycolipid, a complex glycolipid found in corn, soybean, flax, and other seeds.

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