Wakeman—Pigments of Flowering Plcmts. 881 
This compound is found in the root of Oldenlandia umbellata. 1 
It crystallizes in yellow needles which melt at 209°. It is 
slightly soluble in alcohol and acetic acid, insoluble in chloro¬ 
form and carbon disulphide. In solutions of alkaline carbonates 
it dissolves with a bright red color. It has no dyeing properties. 
Antlnragallol dimethyl ether B, Dimethyl-1, 2-hydroxy-3-an- 
thraquinone. 
This compound occurs also in the root of Oldenlandia um¬ 
bellata. It crystallizes in long pale straw colored crystals 
which melt at 230°-232° and are difficultly soluble in alcohol, 
acetic acid, and ether; but soluble in alkali solutions with a 
red color. 
Anthragallol dimethyl ether C, Dimethyl-2, 3-hydroxy-l-an- 
thraquinone. 
This third dimethyl ether also occurs in the root of Olden¬ 
landia umbellata. It forms a barium salt melting at 212°-213° 
and a lead salt. 
56— S. A. L. 
