<http://webisa.webdatacommons.org/prov/116659532>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/209680919> .
<http://webisa.webdatacommons.org/prov/104928826>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/209680919> .
<http://webisa.webdatacommons.org/209680919>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/209680919>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/209680919>	<http://www.w3.org/ns/prov#value>	"Preferably R2 and R3 are hydrogen or C1-4 alkyl such as methyl or ethyl." .
<http://webisa.webdatacommons.org/prov/375325740>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/209680919> .
<http://webisa.webdatacommons.org/prov/295754617>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/209680919> .