SBI-477 is an insulin signaling inhibitor that deactivates the transcription factor MondoA, leading to reduced expression of the insulin pathway suppressors thioredoxin-interacting protein (TXNIP) and arrestin domain-containing 4 (ARRDC4). SBI-477 inhibits triacylglyceride (TAG) synthesis and enhances basal glucose uptake in human skeletal myocytes.