About: http://webisa.webdatacommons.org/73176814

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	where R1, R2 and Z1 to Z4 are independently chosen from hydrogen and organic moieties having about 1???60 carbon atoms, such as about 1???20, about 1???12, or about 1???6 carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com