| http://www.w3.org/ns/prov#value | - An intermediate of compound of formula XLX, where P is a protecting group, can be synthesized by reacting compound of formula XLIX with a base (e.g. sodium hydride) in a solvent (e.g. THF), followed by an appropriate reagent for introduction of a protecting group (P???X, e.g. triisopropylsilylchloride).
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