sigma試劑 右美沙芬 氫溴酸鹽 ,Dextromethorphan hydrobromide D9684 - meets USP testing specifications
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sigma試劑 N,N-二乙基甲胺,N,N-Diethylmethylamine,D98203 - 97%
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sigma試劑 18α-甘草次酸, 18α-Glycyrrhetinic acid,G8503 - ≥95%
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