About: http://webisa.webdatacommons.org/260879872

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	Typically R1, R2 and R3 are alkyl groups, preferably unsubstituted, having from 1 to 12 carbon atoms, particularly 1 to 8, and most preferably 4 to 6 carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com