c20h16o3

from The Collaborative International Dictionary of English v.0.48
Rosolic \Ro*sol"ic\, a. [Rose + carbolic.] (Chem.)
   Pertaining to, or designating, a complex red dyestuff (called
   rosolic acid) which is analogous to rosaniline and aurin. It
   is produced by oxidizing a mixture of phenol and cresol, as a
   dark red amorphous mass, {C20H16O3}, which forms weak salts
   with bases, and stable ones with acids. Called also {methyl
   aurin}, and, formerly, {corallin}.
   [1913 Webster]
    

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