Chlorochrymorin

(1R,2aα,3aS,5aα,8aβ,8bα)-2,2a,4,5,5a,6,8a,8b-Octahydro-2α-chloro-1-hydroxy-4α-[(S)-1-hydroxyethyl]-1,6β-dimethyloxireno[1,7a]indeno[4,5-b]furan-7(1H)-one