Principal polysaccharide from endosperm of guar seeds, Cyamopsis tetragonaloba (L.) Taub., Leguminosae: Heyne, Whistler, J. Am. Chem. Soc. 70, 2249 (1948). Structure: Whistler, Durso, ibid. 74, 5140 (1952). Configuration: Koleske, Kurath, J. Polym. Sci. A 2, 4123 (1964). Review: Deuel et al., Chimia 8, 64 (1954).