<http://webisa.webdatacommons.org/prov/213567024>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/263641005> .
<http://webisa.webdatacommons.org/263641005>	<http://www.w3.org/ns/prov#value>	" preferably R13 is a methyl or an ethyl radical;" .
<http://webisa.webdatacommons.org/263641005>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/263641005>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .