heptacyclic en · ADJ
Etymology
From hepta- + cyclic.
Meanings
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(not-comparable) Formed of seven rings
Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-Aldrich Reaction of quadricyclane with Smith’s diene produces the hexacyclic structure 8, while controlled Mitsudo cycloaddition of DMAD onto 8 can be used to form the heptacyclic system 9.