About: http://webisa.webdatacommons.org/130705109

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	R1 is an alkylene group having from about 2 to about 6, and preferably from about 2 to about 3 carbon atoms,
http://www.w3.org/ns/prov#wasQuotedFrom	google.es