prov:value
| - In case that protective groups are, for example, groups such as benzyl, benzyloxycarbonyl, substituted alkoxycarbonyl, adamantyloxycarbonyl, trityl, methoxymethyl, substituted phenylthio or the like, the protective groups may be removed by hydrolysis, which is carried out by treating the compound (IX) or the salt thereof with water preferably in the presence of an acid such as hydrobromic acid, hy
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