Saturated or unsaturated, respectively, polycyclic hydrocarbons
consisting of fused five-membered rings, commonly but not necessarily incorporating
the skeleton of quinacene (tricyclo[5.2.1.04,10
E.g. bicyclo[3.3.0]octane, dodecahedrane.
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on
structure (IUPAC Recommendations 1995))
on page 1360