Compound 2

3',4'-Di-tert-butyl-2,2,2'',2'',5,5,5'',5''-octakis(trimethylsilyl)dispiro[silolane-1,2'-tricyclo[2.1.0.0^1,3]pentasilane-5',1''-silolane]

From: A heavy analogue of the smallest bridgehead alkene stabilized by a base