<http://webisa.webdatacommons.org/175805499>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .
<http://webisa.webdatacommons.org/prov/204283887>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/175805499> .
<http://webisa.webdatacommons.org/175805499>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/175805499>	<http://www.w3.org/ns/prov#value>	"X.sup.1 and X.sup.2, which are different from each other, are a hydrogen atom or a group represented by --(CH.sub.2).sub.3--NHC(.dbd.NH)NH.sub.2;" .