About: http://webisa.webdatacommons.org/130639130

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 hydrogen or an alkyl group, preferably having about 1 to 12 carbon atoms, such as methyl and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com