Chemistry is traditionally divided into organic and inorganic chemistry. Recommanded Product: 65202-50-8, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 65202-50-8
Small molecule antagonist of leukocyte function associated antigen-1 (LFA-1): Structure-activity relationships leading to the identification of 6-((5 S,9 R)-9-(4-Cyanophenyl)-3-(3,5-dichlorophenyl)-1-methyl-2,4-dioxo-1,3,7- triazaspiro[4.4]nonan-7-yl)nicotinic acid (BMS-688521)
Leukocyte function-associated antigen-1 (LFA-1), also known as CD11a/CD18 or alphaLbeta2, belongs to the beta2 integrin subfamily and is constitutively expressed on all leukocytes. The major ligands of LFA-1 include three intercellular adhesion molecules 1, 2, and 3 (ICAM 1, 2, and 3). The interactions between LFA-1 and the ICAMs are critical for cell adhesion, and preclinical animal studies and clinical data from the humanized anti-LFA-1 antibody efalizumab have provided proof-of-concept for LFA-1 as an immunological target. This article will detail the Structure-activity relationships (SAR) leading to a novel second generation series of highly potent spirocyclic hydantoin antagonists of LFA-1. With significantly enhanced in vitro and ex vivo potency relative to our first clinical compound (1), as well as demonstrated in vivo activity and an acceptable pharmacokinetic and safety profile, 6-((5S,9R)-9-(4-cyanophenyl)-3- (3,5-dichlorophenyl)-1-methyl-2,4-dioxo-1,3,7-triazaspiro-[4.4]nonan-7-yl) nicotinic acid (2e) was selected to advance into clinical trials.
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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2441 – PubChem