Summary 1. D-Altrosan< l, 5> p< 1, 6> has been converted to the following new crystalline substances: 2, 3, 4-triacetyl-D-altrosan; a-pentaacetyl-D-altrose; a-acetochloro-maltrose;@- 2, 3, 4, 6-tetraacetyl-D-altrose; tetraacetyl-p-methyl-D-altroside; tetraacetyl-a-methyl-D- altroside; a-methyl-D-altroside. 2. a-Methyl-D-altroside, of [a] 2 0~+ 125.8'in water, has been proved by periodic acid oxidation methods to possess the a-configuration and a ...