c8h12o4

from The Collaborative International Dictionary of English v.0.48
Terpenylic \Ter`pe*nyl"ic\, a. [Terpene + -yl + -ic.] (Chem.)
   Of, pertaining to, or designating, an acid, {C8H12O4} (called
   also terpentic acid), homologous with terebic acid, and
   obtained as a white crystalline substance by the oxidation of
   oil of turpentine with chromic acid.
   [1913 Webster]
    
from The Collaborative International Dictionary of English v.0.48
Xeronic \Xe*ron"ic\, a. [Gr. xhro`s dry + citraconic.] (Chem.)
   Pertaining to, or designating, an acid, {C8H12O4}, related to
   fumaric acid, and obtained from citraconic acid as an oily
   substance having a bittersweet taste; -- so called from its
   tendency to form its anhydride.
   [1913 Webster]
    

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