<http://webisa.webdatacommons.org/153415488>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/52692132>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/153415488> .
<http://webisa.webdatacommons.org/prov/471834469>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/153415488> .
<http://webisa.webdatacommons.org/153415488>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.it> .
<http://webisa.webdatacommons.org/153415488>	<http://www.w3.org/ns/prov#value>	"[0011] Preferably each R group is an alkyl group; most preferably each R is a methyl or ethyl group." .