This alkaloid from Spireae japonica occurs with spiradine A. NMR studies
show the presence of a methylene group at a quaternary carbon atom, an
exocyclic methylene group and an oxazolidine ring in the molecule.
ChEBI: Spiredine is a diterpenoid. It derives from a hydride of an atisane.
Gorbunov, Shevchenko, Ban'korskii, Khim. Prir. Soedin., 12, 124 (1976)
