2(1H)-Naphthalenone,8-bromo-3-(3-bromo-1,2,2-trimethylcyclopentyl)-4a,5,6,7,8,8a-hexahydro-4a,5-dihydroxy-5,8a-dimethyl-,[4aR-[3(1R*,3R*),4aa,5b,8b,8ab]]-