Chemical Name: 1-(Ethylsulfonyl)-3-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]-3-azetidine-acetonitrile. Alternate Names: INCB028050, LY3009104
JAK 1/2 inhibitor
Molecular Weight:
371.42
Purity:
98% by HPLC NMR (conforms)
Form:
White or off-white solid
CAS Number:
[1187594-09-7]
Formula:
C16H17N7O2S
Application Notes:
Baricitinib, approved by the FDA for two inflammatory disorders, rheumatoid arthritis and alopecia areata, selectively inhibits Janus kinase 1 (IC50 = 5.9 nM) and 2 (5.7 nM), over 3 (0.56 µM).1 It thereby blocks JAK/STAT signaling, reducing cytokine release and suppressing the innate and adaptive immune systems.1,2 Was recently shown to significantly improve COVID-19 symptoms in a preliminary human trial, presumably through suppression of the cytokine release syndrome (''cytokine storm) induced by SARS-CoV-2 infection.3
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