24268-44-8 (3aR,6S)-3,3a,4,5,6aβ,7,9aβ,9bα-Octahydro-4α-hydroxy-9-methyl-3-methylenespiro[azuleno[4,5-b]furan-6(2H),2-oxiran]-2-one 24268-45-9 (E)-4-Hydroxy-2-(hydroxymethyl)-2-butenoic acid [(3aR,6S)-3,3a,4,5,6aβ,7,9aβ,9bα-octahydro-9-methyl-3-methylene-2-oxospiro[azuleno[4,5-b]furan-6(2H),2-oxiran]-4α-yl] ester