Modhephene

2-Modhephene

(3aS,6R,6aR)-5,6-Dihydro-1,3,3,6-tetramethyl-3H,4H-3a,6a-propanopentalene

(3aR,4R,6aS)-5,6-Dihydro-1,1,3,4-tetramethyl-1H,4H-3a,6a-propanopentalene