Literature References: Isoln from Ailanthus altissima (Mill.) Swingle (A. glandulosa Desf.), Simaroubaceae, and proposed structure: Casinovi et al., Tetrahedron Lett. 1965, 2273. Isoln from Castela nicholsoni Hook, Simaroubaceae, and revised structure: Stöcklin et al., ibid. 1970, 2399.
Properties: mp 253-255°. Practically insol in weak alkaline solns. Slightly sol in sodium carbonate, easily dissolved by sodium hydroxide.
Properties: mp 264-265° for 11-acetate; mp 225° for 2-acetate.
Properties: mp 269-270° (from alcohol). Also reported as mp 260-262°.