Synonyms: Spiro[cyclopropane-1,9-tetracyclo[3.3.1.02,4.06,8]nonane],2-methyl-,(1-alpha-,2-bta-,4-bta-,5-alpha-,6-bta-,8-bta-)-(9CI);Spiro[cyclopropane-1,9-tetracyclo[3.3.1.02,4.06,8]nonane], 2-methyl-, (1-alpha-,2-ba-,4-ba-,5-alpha-,6-ba-,8-ba-)- (9CI)