Butalbital
Products In many countries, drugs containing butalbital are no longer approved (e.g., Cafergot-PB). Combination products are still on the market in some countries, including the United States, where numerous products are available. Structure and properties Butalbital (C11H16N2O3, Mr = 224.3 g/mol) or 5-allyl-5-isobutylbarbituric acid exists as a slightly bitter, white, odorless, crystalline powder that is … Butalbital
