(3aR-(3aalpha,5beta,7alpha,8abeta,9aalpha))-3a,5,6,7,8,8a,9,9a-Octahydro-7-hydroxy-5,8a-dimethyl-3-methylenenaphtho(2,3-b)furan-2(3H)-one 2-Hydroxyalantolactone 68776-45-4 Naphtho(2,3-b)furan-2(3H)-one, 3a,5,6,7,8,8a,9,9a-octahydro-7-hydroxy-5,8a-dimethyl-3-methylene-, (3aR-(3aalpha,5beta,7alpha,8abeta,9aalpha))-