<http://webisa.webdatacommons.org/prov/117943179>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/315144843> .
<http://webisa.webdatacommons.org/315144843>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/315144843>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/315144843>	<http://www.w3.org/ns/prov#value>	"In formula PF3, R4R and R4R??? are preferably H and/or R4L and R4L??? are preferably ethyl or especially methyl." .