0 Ibudilast CAS 50847-11-5 In APIs, Pharmaceutical Chemicals, Products 50847-11-5,Ibudilast,3-Isobutyryl-2-isopropylpyrazolo[1,5-a]pyridine; 2-Methyl-1-[2-(1-methylethyl)pyrazolo[1,5-a]pyridin-3-yl]-1-propanone; 2-Isopropyl-3-isobutyrylpyrazolo[1,5-a]pyridine