844 Wisconsin Academy of Sciences, Arts, and Letters. 
Luteolin — methyl—ether is found as a glucoside in the green 
herb of parsley. 
Lotoflavin, — Tetrahydroxy—~l , 3, 2', 4' — flavone. 
CH 
CH COH 
Lotoflavin was first met with in 1900 by Dunstan 1 in Lotus 
arabicus, a small leguminous plant growing abundantly in 
Egypt. This plant, which very closely resembles the com¬ 
mon vetch, is commonly known as kuther. From the fact that 
fused with alkalies it yields /3-resorcylic acid and phloroglucin, 
Dunstan and Henry 2 conclude that the structure of lotoflavin is 
as above. 
Lotoflavin occurs in the Lotus arabicus in the form of a gluco¬ 
side, lotosin, which by the action of dilute acids, or of a special 
enzyme, lotase, is hydrolised yielding lotoflavin, sucrose, and hy¬ 
drocyanic acid. 
Lotoflavin is a yellow crystalline substance readily soluble in 
alcohol or hot glacial acetic acid. It dissolves also in alkalies 
with a bright yellow color. It does not combine with mineral 
acids, but it forms a triacetyl derivative and two isomeric tri¬ 
methyl ethers. By the action of fused alkalies it is converted 
into phloroglucin and resorcylic acid. 
Fisetin,—Tetrahydroxy a — 3 r , 4 f , a — flavone, or 
Trihydroxy — 3, 3', 4' flavonol. 
1 Proc. Roy. Soc., 67, p. 22-f; 68, p. 374. 
2 Chem. News., 8, p. 301; 84, p. 26. 
