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We have recently discussed methods that rely on solvent\u2010driven exchanges to enhance NOE correlations between exchangeable and non\u2010exchangeable protons in nucleic acids. Such methods, however, fail when trying to establish connectivities within pools of labile protons. This study introduces an alternative that also enhances NOEs between such labile sites, based on encoding a\u2005priori selected peaks by selective saturations. The resulting selective magnetization transfer (SMT) experiment proves particularly useful for enhancing the imino\u2013imino cross\u2010peaks in RNAs, which is a first step in the NMR resolution of these structures. 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