CAS No 8030-53-3 , (1S,2S,4aR,4bR,7S,9aR,10S,10aR)-2-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 - (1S,2S,4aR,4bR,7S,9aR,10S,10aR)-2-hydroxy-1-methyl-8-methylidene-13-oxododecahyd