A degradation product of penicillin, C5H11NO2S, that is used as a chelating agent and in the treatment of rheumatoid arthritis and copper poisoning.是什么意思_A degradation product of penicillin, C5H11NO2S, that is used as a chelating agent and in the treatment of rheumatoid arthritis and copper poisoning.在线翻译_英语_读音_用法_例句