81470-39-5
(3S,3aS,7aS)-6-methyl-3-(4-methyl-3-pentenyl)-3a,7,7a-trihydrobenzofuran-2,4-dione

162599-59-9
(1aS,2aS,5S,5aS,6S,6aS)-2,2a,5,5a,6,6a-hexahydro-1a-methyl-5-(4-methyl-3-pentenyl)-6-<(triethylsilyl)oxy>oxirenobenzofuran-4(1aH)-one

参考文献

Amano, Seiji; Takemura, Noriaki; Ohtsuka, Masami; Ogawa, Seiichiro; Chida, Noritaka Tetrahedron, 1999, vol. 55, # 13 p. 3855 - 3870 doi: 10.1016/S0040-4020(99)00096-4