About: http://webisa.webdatacommons.org/9246372

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	n; Y is C???O; and X is a direct bond or a substituent selected from the group consisting of NH, oxygen or alkylene having 1 to 3 carbon atoms. 4.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com