Pl. note that we are getting one extra impurity peak ( Marked in RED )as earlier problematic consignment at the RT = about 4.30, before Rifa Quinone RT = about 6.25) having more% than Rifa quinone as well as not complying the USP Lim = NMT 1.0%.

• 请注意我们得到了一个额外的杂质峰（红色标记），保留时间约4.；30，在醌氏利福平保留时间约6