(3aR,3bS,5aR,6R,8aS,8bS)-6-[(1R)-1,5-dimethylhexyl]-1,3a,5a-trimethyl-2,3,3a,3b,4,5,5a,6,7,8,8a,8b,9,10-tetradecahydroindeno[5,4-e]indolium iodide