Noun
dienofuge (plural dienofuges)
(organic chemistry) Any organic compound formed when a diene moiety is removed from a molecule
Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-Aldrich
However, it is again apparent that cyclopentadiene is a reluctant dienofuge since rearrangement of the strained bicyclo[2.1.0]pentane moiety occurs preferentially.