About: http://webisa.webdatacommons.org/5726572

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	In the above formula, Y1 and Y2, independently from each other, are preferably a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, especially 1 to 5 carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com