Research at Japan Tobacco Inc. has led to the development of 6-aminopyrazolopyrimidine compounds acting as NLRP3 inflammasome inhibitors and reported to be useful for the treatment of arteriosclerosis, gout, inflammatory bowel disease, amyotrophic lateral sclerosis, multiple sclerosis, nonalcoholic steatohepatitis (NASH), Alzheimer’s and Parkinson’s diseases.