<http://webisa.webdatacommons.org/26580616> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/464017595> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/26580616> . <http://webisa.webdatacommons.org/26580616> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.fr> . <http://webisa.webdatacommons.org/26580616> <http://www.w3.org/ns/prov#value> "R1 is an alkylene group having from about 2 to about 6 carbon atoms," .