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<http://webisa.webdatacommons.org/65633439>	<http://www.w3.org/ns/prov#value>	"The bases are metal alkoxides (e.g. sodium methoxide), alkali metal hydroxides such as sodium hydroxide, alkali metal carbonates such as potassium carbonate, tertiary amines such as triethylamine, or pyridines such as 4-dimethylaminopyridine or" .