<http://webisa.webdatacommons.org/prov/464850961>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/316085381> .
<http://webisa.webdatacommons.org/316085381>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/316085381>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/316085381>	<http://www.w3.org/ns/prov#value>	"R1 and R2 are each independently hydrogen or an organic group, and R3 is an organic group;" .