penicillamine
noun
pen·i·cil·la·mine ˌpe-nə-ˈsi-lə-ˌmēn 
: an amino acid C5H11NO2S that is obtained from penicillins and is used especially in the treatment of cystinuria, rheumatoid arthritis, and poisoning by metals (such as copper or lead)
Example Sentences
Recent Examples on the Web Drugs that interact with zinc include certain antibiotics, penicillamine used for Wilson's disease and rheumatoid arthritis and the cancer treatment cisplatin. 
Lauren Corona, chicagotribune.com, 23 Feb. 2021
Lauren Corona, chicagotribune.com, 23 Feb. 2021 Word History
Etymology
penicillin + amine
First Known Use
1943, in the meaning defined above
Medical Definition
penicillamine
noun
pen·i·cil·la·mine ˌpen-ə-ˈsil-ə-ˌmēn
: an amino acid C5H11NO2S that is obtained from penicillins and is used especially to treat cystinuria, rheumatoid arthritis, and metal poisoning (as by copper or lead)