<http://webisa.webdatacommons.org/prov/503325576>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/130756274> .
<http://webisa.webdatacommons.org/130756274>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/516189422>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/130756274> .
<http://webisa.webdatacommons.org/prov/216232012>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/130756274> .
<http://webisa.webdatacommons.org/130756274>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/41147284>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/130756274> .
<http://webisa.webdatacommons.org/130756274>	<http://www.w3.org/ns/prov#value>	"Preferably, A is an oxygen atom, B has two carbons, R2 and R3 are methyl or ethyl, and R4 is methyl, ethyl, or benzyl." .