<http://webisa.webdatacommons.org/172430191>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/63419341>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/172430191> .
<http://webisa.webdatacommons.org/172430191>	<http://www.w3.org/ns/prov#value>	"g that includes 0 to 2 hetero atoms selected from N, O or S; Rn is hydrogen or lower alkyl, provided that at least one of R, R' and R is other than hydrogen." .
<http://webisa.webdatacommons.org/172430191>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .