About: http://webisa.webdatacommons.org/446543629

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	By free carboxylic group is meant a group of formula--CO2 R, wherein R is hydrogen, ammonium, substituted ammonium, or an alkali metal, such as lithium, sodium or potassium.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com