<http://webisa.webdatacommons.org/201507359>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/201507359>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .
<http://webisa.webdatacommons.org/prov/471834631>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/201507359> .
<http://webisa.webdatacommons.org/201507359>	<http://www.w3.org/ns/prov#value>	"R.sup.2 particularly preferably represents hydrogen, methyl, ethyl, methylthio, ethyl-thio, or together with R.sup.1 represents methylene, ethane-1,2-diyl (dimethylene) or propane-1,3-diyl (trimethylene), or--if R.sup.1 and R.sup.2 are attached" .