<http://webisa.webdatacommons.org/254391033>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<sumobrain.com> .
<http://webisa.webdatacommons.org/prov/375325737>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/254391033> .
<http://webisa.webdatacommons.org/254391033>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/254391033>	<http://www.w3.org/ns/prov#value>	"Most often, R 5 is H or lower alkyl, especially methyl, ethyl, propyl and butyl." .