About: http://webisa.webdatacommons.org/8745144

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 R1 is a photocleavable protecting group and X is a leaving group, i.e., from the parent acid HX. The stronger acids typically correspond to better leaving groups and thus, more reactive acylating agents.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com