About: http://webisa.webdatacommons.org/405997239

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	The alkyl group for R1 to R4 may be linear or branched, and preferably has 1 to 20 carbon atoms, particularly 1 to 10 carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com