Tricyclic saturated @H02889@, systematically named tricyclo[a.b.c.0 1,(a+2) ]@A00222@; have been referred to as [a.b.c]propellanes.
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See:
paddlanes
Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1360 [Terms] [Paper]