C16H12O5

from The Collaborative International Dictionary of English v.0.48
brasilein \bra*sil"e*in\, {C16H12O5}, to which brazilwood owes
   its dyeing properties.
   [Webster 1913 Suppl.] Brasque \Brasque\, n. [F.] (Metal.)
   A paste made by mixing powdered charcoal, coal, or coke with
   clay, molasses, tar, or other suitable substance. It is used
   for lining hearths, crucibles, etc. Called also {steep}.
   [Webster 1913 Suppl.]
    

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