About: http://webisa.webdatacommons.org/8813598

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	R4 may be, for example, hydrogen, methyl, ethyl, benzyl or pyridylmethyl, and R5 may be, for example hydrogen or methyl.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com