About: http://webisa.webdatacommons.org/268856828

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 Formula (4), R1 and R2 each represent a hydrogen or an alkyl group, wherein the alkyl group is an alkyl group preferably having 1 to 20 carbon atoms and particularly preferably having 1 to 8 carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com