Spermine precursor-1 (Compound 1) is a redox-sensitive spermine precursor for the potential research of snyder robinson syndrome. Spermine precursor-1 inhibits wild-type (CMS-24949) and spermine synthase gene (SMS) mutant (CMS-26559, and CMS-6233) fibroblast cells with IC 50 s of 326.7, 198.5, and 244.1 μM, respectively.