About: http://webisa.webdatacommons.org/450608633

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	and pharmaceutically acceptable salts thereof. In one embodiment, P.sub.1 is a hydrogen atom, X is an oxygen atom and Z is a carboxylic acid or a carboxylic ester.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com