Wall Street will be watching closely for such adverse effects as anemia that foiled Gilead Sciences Inc.’s CD47-binding magrolimab earlier this year, but so far Shattuck Labs Inc.’s SL-172154 looks strong in combination with azacitidine to treat front-line higher-risk myelodysplastic syndrome (HR-MDS) and TP53-mutant (TP53m) acute myeloid leukemia (AML).