H2N.C6H4.CO.O.C2H5

from The Collaborative International Dictionary of English v.0.48

benzocaine \benzocaine\ n.
   a chemical substance obtainable as a white crystalline ester
   ({H2N.C6H4.CO.O.C2H5}) used as a local anesthetic.
   Chemically, it is 4-aminobenzoic acid ethyl ester.

   Syn: ethyl p-aminobenzoate.
        [WordNet 1.5]