Coptisine
https://www.novactabio.com/shop/cell25sk8014-coptisine-12358
https://www.novactabio.com/web/image/product.template/12358/image_1920?unique=56600da
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Coptisine is an alkaloid from Chinese goldthread, and acts as an efficient uncompetitive IDO inhibitor with a Ki value of 5.8 μM and an IC50 value of 6.3 μM.
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cell25sk8014