988 Wisconsin Academy of Sciences, Arts, and Letters. 
Albaspidin. 19 Albaspidin crystallizes in fine colorless needles 
melting at 147 to 148°C. It is readily soluble in ether, chloro¬ 
form and benzol, difficultly soluble in alcohol, acetone and 
glacial acetic acid. Its constitution is stated to be represented 
by one of the three following formulae : 20 
I 
Flavaspidic acid. Flavaspidic acid (C 24 H 28 0 8 ) was first 
isolated from the ethereal extract by Boehm. It is stated to 
exist in two forms (a and /?) which differ in their melting points, 
the a-flavaspidic acid melting at 92 °C and the ^-modification at 
156 °C. The a-acid on heating is converted into the j3- acid 
19 Albaspidin should not be confused with aspidin. Hausmann has shown 
the latter to be a constituent of Dryopteris spinulosa O. Ku.ntze, but that 
it is not present in Dryopteris filix mas Schott. Arch. d. Pharm. (1899), 
237, p. 544. 
30 Boehm, Arch. f. Exp. Path. u. Pharm. (1897), 38, p. 35; Ann. d. Chem. 
(1901), 318, p. 268. 
