About: http://webisa.webdatacommons.org/406045136

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	When R3 is C1-6 alkoxy and R4 is hydrogen, preferred examples of R3 include methoxy and ethoxy, of which methoxy is more preferred.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com