About: http://webisa.webdatacommons.org/176772312

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	nt R groups are joined to form a C4-C20 ring, except that R independently may also be hydrogen except for R groups attached to the carbon atoms directly bonded to the nitrogen atoms, and n is 1, 2, 3 or 4. 5.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com