About: http://webisa.webdatacommons.org/416561876

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	More preferably, one of R1 to R5 is a halogen atom, particularly chlorine atom.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com