About: http://webisa.webdatacommons.org/291422405

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	R.sub.4 and R.sub.6 may also together form a heterocyclic group with 3 to 7 carbon atoms which may contain hetero atoms in addition to the nitrogen atom to which both groups are attached, e.g. nitrogen, oxygen or sulphur.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com