Structures within this class of chemicals can be named according to the number of atoms in each ring in addition to the systematic nomenclature of IUPAC naming rules. The smallest member of the family, consisting of four fused cyclopropane rings, is [3.3.3.3]fenestrane, which has systematic name tetracyclo[2.1.0.01,3.02,5]pentane and is also called pyramidane.
The chemical structures within this class can be named by counting the number of atoms in each ring and following IUPAC naming rules. The smallest member of this family, a four-ring structure called [3.3.3.3]fenestrane, has the systematic name tetracyclo[2.1.0.01,3.02,5]pentane and is also known as pyramidane.