About: http://webisa.webdatacommons.org/304339947

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	Where the group to be derivatized is a carboxylic acid, Y1 (or Y2) is preferably --O-- (to form an ester linkage) or --NH-- (to form an amide linkage).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com