About: http://webisa.webdatacommons.org/57302590

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	Preferably, all of the radicals represented by R3 and R4 are selected from the group consisting of methyl and phenyl radicals and most preferably R3 and R4 are methyl.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es