About: http://webisa.webdatacommons.org/136168420

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	Depending upon whether Y is an S, O, or N, a free sulfhydryl, free hydroxyl, or free amino group, respectively, will be added to the compound.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com