<http://webisa.webdatacommons.org/137845493>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
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<http://webisa.webdatacommons.org/prov/140954789>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/137845493> .
<http://webisa.webdatacommons.org/137845493>	<http://www.w3.org/ns/prov#value>	"The perfluoro- or chloro-alkanoyl protecting group may also be removed by mild acid or basic hydrolysis or alcoholysis, but preferably under acidic conditions when R4 is a chlorine atom." .