About: http://webisa.webdatacommons.org/201566540

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	As used in the following examples, the references to substituents such as R1, R2, etc., refer to the corresponding compounds and substituents in Formula I above.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com