78259-50-4 7-hydroxy-1-methyl-8-methylidene-13-oxo-1,2,4b,5,6,7,8,9,10,10a-decahydro-4a,1-(epoxymethano)-7,9a-methanobenzo[a]azulene-10-carboxylic acid 78261-83-3 4-{[(3S,6aR,9aS)-4-methoxy-1,11-dioxo-1,2,3,6a,9a,11-hexahydrocyclopenta[c]furo[3',2':4,5]furo[2,3-h]chromen-3-yl]oxy}-4-oxobutanoic acid