IUPAC:(2S,4aS,6aS,6bR,8aR,12aR,12bR,14bR)-2,4a,6a,6b,9,9,12a-heptamethyl-10-oxo-11-[(pyrazin-2-yl)methylidene]-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-icosahydropicene-2-carboxylic acid
IUPAC:(2S,4aS,6aS,6bR,8aR,12aR,12bR,14bR)-2,4a,6a,6b,9,9,12a-heptamethyl-10-oxo-11-[(pyrazin-2-yl)methylidene]-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-icosahydropicene-2-carboxylic acid