IUPAC:(1R,1'R,2R,3'S,5S,6'S,9S,10S,10'S,11R,11'R,12R)-2-hydroxy-2,3',11,12'-tetramethyl-6-methylidene-2',8,9'-trioxaspiro[tetracyclo[9.2.2.0^{1,10}.0^{5,9}]pentadecane-12,7'-tetracyclo[9.3.0.0^{1,3}.0^{6,10}]tetradecane]-12',14-diene-7,8'-dione
IUPAC:(1R,1'R,2R,3'S,5S,6'S,9S,10S,10'S,11R,11'R,12R)-2-hydroxy-2,3',11,12'-tetramethyl-6-methylidene-2',8,9'-trioxaspiro[tetracyclo[9.2.2.0^{1,10}.0^{5,9}]pentadecane-12,7'-tetracyclo[9.3.0.0^{1,3}.0^{6,10}]tetradecane]-12',14-diene-7,8'-dione