| http://www.w3.org/ns/prov#value | - Removal of the DNP group is also carried out, for example, using an approximately 3-10% solution of 2-mercaptoethanol in DMF/water at 15-30.degree..Hydrogenolytically removable protective groups (e.g. BOM, CBZ or benzyl) can be removed, for example, by treating with hydrogen in the presence of a catalyst (e.g. of a noble metal catalyst such as palladium, expediently on a support such ascarbon).
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