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(3S,3aS,8bS)-3-Isopropenyl-3a,6,8b-trimethyl-2,3,3a,8b-tetrahydro-1H-benzo[b]cyclopenta[d]furan
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(3aS,8bS)-(-)-3a,8b-Dihydro-3,3a,6,8b-tetramethyl-1H-cyclopentabenzofuran

参考文献

Srikrishna; Babu Tetrahedron Letters, 2001, vol. 42, # 29 p. 4913 - 4914 doi: 10.1016/S0040-4039(01)00842-5