About: http://webisa.webdatacommons.org/135825455

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The composition of claim 1 wherein at least one of R1 and R2 is a group having the following structure: ##STR6## where R3 and R4 are hydrogen, alkyl, cycloalkyl, aralkyl groups, or R3 and R4 join to form a heterocyclic ring.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au