C[C@H]1CC[C@@]2(NC=O)[C@H]1[C@@H]1[C@H](CC[C@@H]2C)C1(C)C N-[(1aS,4S,4aS,7S,7aR,7bS)-1,1,4,7-tetramethyl-2,3,4,5,6,7,7a,7b-octahydro-1aH-cyclopropa[h]azulen-4a-yl]formamide