<http://webisa.webdatacommons.org/prov/141546618>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/114847689> .
<http://webisa.webdatacommons.org/114847689>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/114847689>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/114847689>	<http://www.w3.org/ns/prov#value>	"R1 and R2 are each independently hydrogen or a non-hydrogen substituent such as specified for R1 and R2 in Formula IA above;" .