(2R,6S,8S,9S)-1,1,9-Trimethyl-2,9-dibromo-5-methylene-8-chlorospiro[5.5]undecane;(2R,6S,8S,9S)-2,9-Dibromo-8-chloro-1,1,9-trimethyl-5-methylenespiro[5.5]undecane;Obtusane
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