Multi-target inhibitors are currently trending in the pharmaceutical research, as they possess increased efficacy and reduced toxicity.In this study multi-target inhibitors for breast cancer are explored from a curated list of natural products, i.e. 4,670 phytochems. belonging to 360 medicinal plants.In-silico screening of phytochems. using SeeSAR and AutoDock Vina resulted in identification of Stearyl Palmitate as a potential drug mol. that inhibits three drug targets, i.e.HER-2, MEK-1 and PARP-1 proteins.Mol. Dynamics Simulation for 100 ns each for these three protein-ligand complexes using Desmond, Maestro platform also confirmed the prediction of multi-target inhibition by Stearyl Palmitate.Further in-vitro MTT assay demonstrated that Stearyl Palmitate has a significant IC50 value of 40 μM against MCF-7 cells and >1000 μM against L929 cells.This confirmed that Stearyl Palmitate is having selective cytotoxicity towards breast cancer cells in comparison to non-cancerous cells.Fluorescence staining and flow cytometry anal. confirmed that, Stearyl Palmitate is inducing apoptosis in MCF-7 cells at IC50 concentrationFinally, in-vivo efficacy and toxicity studies were performed using zebrafishes (Danio rerio).It was observed that the fishes treated with IC50 concentration of Stearyl Palmitate demonstrated 2x folds reduction in tumor size, while double dose resulted in 4x folds reduction in tumor size.Stearyl Palmitate did not demonstrate any toxicity or side effects in the zebrafishes.It is concluded that, Stearyl Palmitate, a phytochem. reported to be present in Althea officinalis is a potential anti-breast cancer agent, with ability to inhibit multiple targets such as HER-2, MEK-1 and PARP-2 proteins.Communicated by Ramaswamy H.Sarma.