About: http://webisa.webdatacommons.org/343223398

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 some specific embodiments, R8 and R9 are hydrogen and R7 is selected from hydrogen, a methyl group, or a mixture thereof; alternatively, R8 and R9 are hydrogen and R7 is a methyl group; or alternatively, R7, R8, and R9 are hydrogen.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au