rac-methyl (9R,10R,12S)-12-(2-methoxy-2-oxoethyl)-9,10-dihydro-9,10-ethanoanthracene-12-carboxylate

rac-(1R,9'S,10'S)-9',10'-dihydrospiro[cyclopentane-1,12'-[9,10]ethanoanthracen]-3-en-2-one

(9',10'-dihydrospiro<2,4-cyclopentadiene-1,11'-<9,10>ethanoanthracen-2-yl>oxy)trimethylsilane

9',10'-dihydro-5-<2-(1,3-dithianyl)>spiro<3-cyclopentene-1,11'-<9,10>ethanoanthracen>-2-one

9',10'-dihydro-5-formylspiroethanoanthracen>-2-one