About: http://webisa.webdatacommons.org/47682915

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	each Rx, independently of the others, is a bond, --O--, --NRN -- or --S-- wherein RN is hydrogen
http://www.w3.org/ns/prov#wasQuotedFrom	google.com