Cyclospongiaquinone-2

Dehydrocyclospongiaquinone 2

(2S)-3',4',4'aα,5',6',7',8',8'a-Octahydro-5-methoxy-2'β,5',5',8'aβ-tetramethylspiro[benzofuran-2(3H),1'(2'H)-naphthalene]-4,7-dione

(4aS,6aS,12aS,12bS)-1,3,4,4a,5,6,6a,8,11,12,12a,12b-Dodecahydro-10-methoxy-4,4,6a,12b-tetramethyl-7,12a-cyclo-6a,7-seco-2H-benzo[a]xanthene-8,11-dione