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CAS No.: 1131-17-5; ChemShuttle supplies building blocks including 5-chloro-3-methyl-1-phenyl-1H-pyrazole (CAS 1131-17-5) for analgesic and anti-inflammatory research. These versatile building blocks feature stable halogen handles for nucleophilic displacement in lead optimization. The compound under CAS 1131-17-5 exemplifies our building blocks portfolio's focus on bioisosteric replacements for benzene rings. Through continuous expansion of chiral building blocks, we enable efficient synthesis of COX-2 inhibitors. Our quality assurance for all building blocks ensures this CAS 1131-17-5 material delivers consistent reactivity in high-throughput screening campaigns.