About: http://webisa.webdatacommons.org/365397051

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, said radicals of R1, R2, R3 and/or R4 comprise 2 to 6 carbon atoms, more preferably 2 to 4 carbon atoms, and particularly preferred 2 or 3 carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com