5220. Isoquassin

Nomenclature

CAS number: 21293-20-9
Picrasmin.
C22H28O6; mol wt 388.45.
C 68.02%, H 7.27%, O 24.71%.

Description and references

Bitter principle from Jamaica quassia, Picrasma excelsa (Sw.) Planch., Simaroubaceae. Isoln: Clark, J. Am. Chem. Soc. 60, 1146 (1938). Identity of isoquassin and picrasmin: Adams, Whaley, ibid. 72, 375 (1950). Isomer of quassin, q.v.: Valenta et al., Tetrahedron 18, 1433 (1962).

Chemical structure

Properties

Crystals from methanol, mp 222-225°. [α]D20 +45.4° (chloroform). uv max: 258 nm (ε 12500).