penicillamine青霉胺 demethylchlortetracycline脱甲金霉素,脱甲氯四环素 demeclocycline脱甲氯四环素,脱甲金霉素,地美环素 dimethyl-carbinol二甲基甲醇,异丙醇 n-demethylated carbacholn-去甲基碳酰胆碱 β,β-dimethylcysteine ρ',ρ'-dichlorodiphenylmethyl carbinol