betweenanenes

https://doi.org/10.1351/goldbook.B00638
Bicyclic @A00224@ having a double bond between the @B00736@ atoms and a @C01092@@A00512@ of each branch to the double bond. Thus @C01092@-bicyclo[m.n.0]alk-1 (m+2)-enes.
B00638.png
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1322 [Terms] [Paper]