About: http://webisa.webdatacommons.org/335723437

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	Suitably R1-R7 can independently represent hydrogen, an aryl group having 6-24 carbon atoms such as a phenyl group or a naphthyl group, or an alkyl groups having from 1-24 carbon atoms, for example, a methyl group.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com