Hello! I need to know whether I can prepare the working solution of the Ibudilast powder (synonym: 2-Methyl-1-[2-(1-methylethyl)pyrazolo[1,5-a]pyridin-3-yl] 1-propanone, 3-Isobutyryl-2-isopropylpyrazolo[1,5-a]pyridine) by diluting it in DMSO and freezing for storage at -20C. As I understand, the manufacturers only recommend storage conditions (+2 to +8C) for powder. But what about working solutions in DMSO? Will the compound be not degraded or damaged after freezing? Thank you.