About: http://webisa.webdatacommons.org/427738770

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	R2 is preferably a hydrogen atom or a methyl or n-propyl group, especially a hydrogen atom.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com