About: http://webisa.webdatacommons.org/426458637

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	When R, R1 or R2 is an alkyl group, it can be methyl, ethyl, propyl, isopropyl, butyl, and isobutyl.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es