About: http://webisa.webdatacommons.org/187564167

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	--CO--O-- or --CO--S-- bond, more specifically a compound represented by the formula: ##STR6## wherein R1 is a hydrogen atom or an acyl group; R2, R3 and R4, same or different, are a bond, an amino acid residue or a group of the formula:
http://www.w3.org/ns/prov#wasQuotedFrom	google.com