About: http://webisa.webdatacommons.org/407273291

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	The sugar hydroxyls (2??? and the 4??? positions) are protected using reagents such as acetic anhydride, benzoic anhydride, benzyl chloroformate, hexamethyldisilazane, or a trialkylsilyl chloride in an aprotic solvent.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com