C6H3.CH3.(OH)2

from The Collaborative International Dictionary of English v.0.48
Orcin \Or"cin\, n. [Etymology uncertain: cf. F. orcine.] (Chem.)
   A colorless crystalline substance, {C6H3.CH3.(OH)2}, which is
   obtained from certain lichens ({Roccella}, {Lecanora}, etc.),
   also from extract of aloes, and artificially from certain
   derivatives of toluene. It changes readily into orcein.
   [1913 Webster]
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