About: http://webisa.webdatacommons.org/221842590

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	of hydrogen and lower alkyl, and wherein R.sub.4 and R.sub.6 are selected from the group consisting of hydrogen, lower alkyl and other substituents as listed in the patent.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com