<http://webisa.webdatacommons.org/prov/46421982>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/191038894> .
<http://webisa.webdatacommons.org/191038894>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/191038894>	<http://www.w3.org/ns/prov#value>	"Preferably in compounds of formula (I-f) R3 represents hydrogen or C1-6-alkoxy such as methoxy, especially hydrogen." .
<http://webisa.webdatacommons.org/191038894>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .