A cell-permeable and bio-available azaindolylmethylpyridamine derivative that acts as a potent inhibitor against FMS and KIT (IC50 = 28 and 16nM, respectively) by targeting the kinases in their inactive DGF-out conformation, while being less effective against Flt3, KDR/VEGFR2, CDC2L6/CDK11/CDK19, NTRK3/TrkC, DDR2, CDK8/cyclin C (IC50 = 91, 130, 350, 620, 700, and 710nM, respectively) and exhibiting much reduced or little potency toward other kinases in a 400-kinase panel study (IC50 >1uM). Shown to effectively inhibit cellular FLT3-ITD, FMS, KIT phosphorylations (IC50 from 20 to 250nM), as well as FLT3-ITD-, FMS-, KIT-dependent proliferations (IC50 from 92 to 380nM). Exhibits in vivo efficacy in several murine inflammation models (20 to 80mg/kg b.i.d.; p.o.) and in preventing rat MRMT-1 breast carcinoma bone metastases-caused osteolysis (30mg/kg b.i.d.; p.o.).