About: http://webisa.webdatacommons.org/236401434

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	(iv) an acid anhydride of formula X in the presence of either an alkali metal salt of the corresponding acid of formula XI or an alkoxide salt of formula XII, wherein M is an alkali metal ion and R is C1 to C6 alkyl;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com