Mepirizol ,its CAS NO. is 18694-40-1,the synonyms is 1-(4-Methoxy-6-methyl-2-pyrimidinyl)-3-methyl-5-methoxypyrazole ; 2-(3-Methoxy-5-methylpyrazol-2-yl)-4-methoxy-6-methylpyrimidine ; 2-(3-Methyl-5-methoxy-1-pyrazolyl)-4-methoxy-6-methylpyrimidine ; 4-Methoxy-2-(5-methoxy-3-methyl-1h-pyrazol-1-yl)-6-methyl-pyrimidin ; 4-Methoxy-2-(5-methoxy-3-methyl-1h-pyrazol-1-yl)-6-methylpyrimidine ; 4-Methoxy-2-(5-methoxy-3-methylpyrazol-1-yl)-6-methylpyrimidin ; Da-398 ; Mebron .