<http://webisa.webdatacommons.org/154188464>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/329498122>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/154188464> .
<http://webisa.webdatacommons.org/154188464>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.ca> .
<http://webisa.webdatacommons.org/154188464>	<http://www.w3.org/ns/prov#value>	"Preference is furthermore given to the compounds of formula I in which the radicals R4 and R7 are hydrogen, and R5, R6 and R8 to R12 are a C1 -C4 -alkyl group or hydrogen." .