SGI-1027 is a selective DNA methyltransferase (DNMT) inhibitor. Inhibits DNMT1, DNMT3A, and DNMT3B with IC₅₀ values of 6, 8, and 7.5 µM, respectively. Treatment of different cancer cell lines with SGI-1027 results in selective degradation of DNMT1 with minimal or no effects on DNMT3A and DNMT3B