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AB-680 (Quemliclustat) is a highly potent and selective inhibitor of CD73 (Ki hCD73 = 4.9 pM on human CD8+ T-cells) and an immune-oncology modulator, highly selective against the closely-related CD39 (10,000-fold selectivity), and a large panel of unrelated enzymes, receptors, and ion channels. It potently reverses AMP and ADO-mediated suppression of immune function in vitro, robustly restores, in the presence high AMP concentration, CD25 expression, IFN-γ production and proliferation of human CD4+ and CD8+ T-cells, and reverses ADO-mediated immune suppression (ref 1). It is currently under evaluation as a cancer immunotherapy agent.
Catalog NO: CT-AB680
Synonym: Quemliclustat, AB680
CAS NO: 2105904-82-1
Mol. Formula: C20H24ClFN4O9P2·2NH3·H2O
MW: 632.9
** in vivo Quality Material. >99.5% by Achiral and Chiral HPLCs (attached). Authenticated Stereo-Structure by 2-D NMR. A monohydrate diammonium salt, validated by a quantitative elemental analysis. Bulk!! Prompt.