<http://webisa.webdatacommons.org/28476511>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/407209141>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/28476511> .
<http://webisa.webdatacommons.org/28476511>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<faqs.org> .
<http://webisa.webdatacommons.org/28476511>	<http://www.w3.org/ns/prov#value>	"represents hydrogen, then R4 is other than hydrogen; and that if" .