82968-93-2 2',2',5,5,6',6',7,7-octamethylspiro[1,3-benzoxaselenole-2,4'-cyclohexane]-1',3',4,5',6-pentone 83178-03-4 SPIRO[CYCLOHEXANE-1,4'(3'H)-[1H-7,9A]- METHANOCYCLOHEPTA[C]PYRAN]-2-CARBOXYLIC ACID6,9'-BIS(ACETYLOXY)HEXAHYDRO-5'-HYDROXY- 3,3-DIMETHYL-8'-METHYLENE-1'-OXO-,(1S,2R,- 4'AS,5'S,6S,7'S,9'R,9'AS)-