About: http://webisa.webdatacommons.org/139653101

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	R.sup.1 is an alkyl group containing from 1 to about 3 carbon atoms; and R.sup.2 is an alkylene group containing from 1 to about 6 carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com