<http://webisa.webdatacommons.org/prov/464455995>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/249459888> .
<http://webisa.webdatacommons.org/249459888>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/249459888>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/249459888>	<http://www.w3.org/ns/prov#value>	"Most preferably R1 is a methyl, ethyl, tert-butyl or benzyl group." .