five-membered
Adjective Satellite
Meaning
of a chemical compound having a ring with five members
Source: WordNetSynonyms
Examples
The five-membered ring also possesses a keto group (in the 8 position), flanked by two secondary amino groups (in the 7 and 9 positions), and deprotonation of one of these at high pH could explain the pK 2 and behavior as a diprotic acid.
Four isomers are cyclic, two of them with a pyranose (six-membered) ring, two with a furanose (five-membered) ring.
The five B subunits form a five-membered ring that binds to GM1 gangliosides on the surface of the intestinal epithelium cells.
The β-lactam ring is itself fused to a five-membered thiazolidine ring.