| http://www.w3.org/ns/prov#value | - For example, methods for the saponification are described in Section 23 of the Reference A, advantageously, the saponification may be effected by using an aqueous solution of an alkali metal, e.g. sodium, potassium or lithium, hydroxide or carbonate, or an alkaline earth metal, e.g. calcium or barium, hydroxide or carbonate in the absence or presence of a water miscible solvent such as an ether, e
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