A sixth alkaloid found in Spiraea japonica L. fil., the base is laevorotatory with
[α]D - 137° (c 1.16, MeOH). Reduction with NaBH4 gives a triol while oxida_x0002_tion with chromic acid in pyridine forms a monoketone, m.p. IS8-l60°C. The
presence of an exocyclic methylene group is confirmed by catalytic reduction
and subsequent oxidation with KMn04 to give a ketone.
Toda, Hirata., Tetrahedron Lett., 5565 (1968)
