About: http://webisa.webdatacommons.org/183104500

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	R2 designates ##STR3## and, in the case where R1 =--NR4 R5, also H, carboxylate or alkyl, in particular methyl,
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr