About: http://webisa.webdatacommons.org/46304383

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	Each of the radicals R1 to R5 is, independently of the others, hydrogen, a halogen, in particular fluorine, chlorine or bromine, or an alkyl group having from 1 to 6 carbon atoms, preferably hydrogen.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com