noun, noun which may take the genitive case particle 'no'
heterocycle
Chemistry term for a ring structure containing at least one atom other than carbon. Often used attributively with の.
See also: 複素環式化合物 (ふくそかんしきかごうぶつ)
Pyridine is a type of heterocycle containing nitrogen.
Heterocyclic compounds are often found in pharmaceuticals.
heterocyclic group
Compound of 複素 (complex, composite) and 環 (ring), reflecting the presence of different elements in the ring structure.