c18h30n2o2

from The Collaborative International Dictionary of English v.0.48

butacaine \butacaine\ n.
   a white crystalline ester ({C18H30N2O2}) that is applied to
   mucous membranes as a topical anesthetic. Chemically it is
   3-(di-n-butylamino)-1-propanol 4-aminobenzoate
   ({H2N.C6H4.CO.O.(CH2)3N(C4H9)2}). It is usually used as the
   sulfate salt.

   Syn: butacaine sulfate.
        [WordNet 1.5 +PJC]