Cyperene

[3aR,(-)]-2,3,3a,4,5,6,7,8-Octahydro-1,4α,9,9-tetramethyl-3a,7β-methanoazulene

3H-3A,7-Methanoazulene, 2,4,5,6,7,8-hexahydro-1,4,9,9-tetramethyl-, (3ar-(3aalpha,4beta,7alpha))-