842 Wisconsin Academy of Sciences, Arts, and Letters. 
ing to the alpinin of Jahns, but found a methyl ether of galangin. 
Jahns in his study of the constitution of galangin found its 
formula to be C 15 H 10 O 5 , also that it has three hydroxy groups, 
and that upon fusion with potassium hydroxide it yields 
benzoic acid, oxalic acid and a phenol like substance. Kostanecki 4 
and his associates by the hydrolysis, and subsequent synthesis of 
galangin, established its formula as given above. 
Galangin crystallizes in yellowish white needles which melt 
at 214-215, and sublime with partial decomposition. It is al¬ 
most insoluble in water, easily in ether, slightly in chloroform 
and benzene. It dissolves in alkalies with a yellow color. It 
yields a triacetyl and a tri methyl derivative, the latter, treated 
with acetic acid, yields a monoacetyl compound. 5 6 7 
Galangin methyl ether. 
— o — 
— C— 
it 
o 
A galangin methyl ether, probably with the methyl group in 
the position indicated above, 6 occurs along with galangin in the 
root of Alpinia officinarum. 7 
Tetrahydroxy flavones. 
Luteoline,—Tetra hydroxy — 1, 3, 3', 4' — flavone. 
C-— 
1 
CH 
I) 
O 
Luteoline was first isolated by Chevreul, 1 in 1830, and named by 
him from its source, 1Reseda luteola. Since that time it has been 
4 Ber., 37, p. 2803. 
5 Ber., 14, p. 2807. 
6 Czapek, Biochemie der Pflanzen, vol. 2, p. 523. 
7 Gazz. chim. ital., 30 (2) p. 327. 
x Jr. Chim. Med. 6, p. 157. 
