About: http://webisa.webdatacommons.org/168577055

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	(ii) R8 and R9 are, independently, R8a, where R8a is hydrogen, alkyl, alkenyl, carbocyclic ring, or heterocyclic ring substituents; or R8 and R9 together comprise a heterocyclic ring including the nitrogen to which they are bonded;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com