【化】 N-methylphenazonium methosulfate
armour; first; nail; shell【医】 carapace; concha; conchae; helo-; nail; onycho-; onyx
vitriol【化】 spirit of alum; sulfuric acid【医】 oil of vitriol; sulfuric acid; vitriol; vitriolic acid
【化】 toluphenazine