(1S,2S,7S,9aR,10S,10aS)-2,7-dihydroxy-1-methyl-8-methylene-2,5,6,7,8,9,10,10a-octahydro-1H-7,9a-methanobenzo[a]azulene-1,10-dicarboxylic acid
(1S,2S,7S,9aR,10S,10aS)-2,7-dihydroxy-1-methyl-8-methylene-2,5,6,7,8,9,10,10a-octahydro-1H-7,9a-methanobenzo[a]azulene-1,10-dicarboxylic acid