About: http://webisa.webdatacommons.org/175906667

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	Rb represents a C1-4 -alkoxy group, an arylmethoxy, arylethoxy, aryloxy, alkyl, aralkyl or aryl group and X2 denotes a nucleophilic leaving group such as a halogen atom, e.g. a chlorine or bromine atom.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com