"Cinchonidine" is a colored etching and aquatint by Damien Hirst, executed on premium Hahnemühle etching paper and presented with full margins. The work exemplifies Hirst's engagement with printmaking as a means to explore pharmaceutical and scientific imagery, themes that recur throughout his practice. The combination of etching and aquatint techniques allows for rich chromatic variation and tonal complexity, creating a sophisticated representation of the chemical compound referenced in the title.