Penicillamine /(?)/

Pen·i·cil·lam·ine

Penicillamine

n.
  1. A substance (C5H11NO2S) which is a degradation product of the penicillins. Chemically it is 3-mercapto-D-valine. It has chelating properties and is used in medicine as an antirheumatic and to chelate copper in cases of hepatolenticular degeneration (Wilson's disease). (Chem., Med.)