Preparation of spermine conjugates with acidic retinoids with potent ribonuclease P inhibitory activity.

Novel mono- and diacylated spermines, readily obtained using isolable succinimidyl active esters of acidic retinoids for the selective acylation of free spermine or in situ activated acidic retinoids for acylating selectively protected spermine followed by deprotection, were shown to inhibit the ribozyme ribonuclease P more strongly than the parent retinoids.