82
3.3 Ligularia japonica (Thunberg) Lessing
Takahashi’s group studied the chemical constituents of L. japonica sourced in Japan
(sample 1) (Table 6) and reported the isolation of the three furanoeremophilanes,
226, 227, and 231 [12, 286]. These three compounds had a hydroxy group at the
Fig. 18 1,10-Epoxyfuranoeremophilanes
M. Tori and C. Kuroda