(3S,3aR,4S,4aR,7R,9aR,9bR,12S)-12-hydroxy-3-methyl-6-methylene-2-oxoperhydro-4a,7-methano-9b,3-propenoazuleno[1,2-b]furan-4-carboxylic acid
(3S,3aR,4S,4aR,7R,9aR,9bR,12S)-12-hidroxi-3-metil-6-metilén-2-oxoperhidr-4a,7-metano-9b,3-propenoazuleno[1,2-b]furán-4-karboxilsav