About: http://webisa.webdatacommons.org/300260895

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	In a further embodiment, R3 represent alkyl, such as methyl.In a still further embodiment, R4 represent hydrogen.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com