c8h6nso4k

Indican \In"di*can\, n. [See {Indigo}.]
   [1913 Webster]
   1. (Chem.) A glucoside ({C14H17NO6}) obtained from woad
      (indigo plant, {Isatis Tinctoria}) and other plants (see
      {indigo}), as a yellow or light brown sirup. When purified
      it is obtained as spear-shaped crystals. It has a nauseous
      bitter taste. By the action of acids, enzymes, etc., it
      breaks down into sugar and indigo. It is the source of
      natural indigo. Chemically it is the 3-glucoside of
      indole, H-indol-3-yl-[beta]-D-glucopyranoside.
      [1913 Webster +PJC]

   2. (Physiol. Chem.) An indigo-forming substance, found in
      urine, and other animal fluids, and convertible into red
      and blue indigo (urrhodin and uroglaucin). Chemically, it
      is indoxyl sulphate of potash, {C8H6NSO4K}, and is derived
      from the indol formed in the alimentary canal. Called also
      {uroxanthin}.
      [1913 Webster]