About: http://webisa.webdatacommons.org/369638035

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	Preferred species of R1, R2 and R3 are a hydrogen atom, a halogen atom, a methyl group, an ethyl group, a methoxy group, and an ethoxy group.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com