Baricitinib Impurity 4 Catalogue B410221 CAS 2271228-52-3 M.W 390.42 M.F C16H18N6O4S Specifications FAQs 2-(3-(4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl)- 1-(ethylsulfonyl)azetidin-3-yl)acetic acid
