About: http://webisa.webdatacommons.org/395378886

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 R4 is located in the para-position i.e. compounds of formula (IB)d, R4 is preferably hydrogen or methyl.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com