M. Tori et al., NOVEL EPOXYEREMOPHILANOLIDES, EREMOPETASITENINS A1, A2, B1, AND B2, FROM PETASITES JAPONICUS, Tetrahedron letters, 38(11), 1997, pp. 1965-1968
Eremopetasitenins A1, A2, B1, and B2 have been isolated from the fresh
rhizomes of Petasites japonicus and their structures determined by sp
ectroscopic methods to have eremophilane skeletons with epoxylactones.
(C) 1997 Elsevier Science Ltd.