cryptopine

from The Collaborative International Dictionary of English v.0.48

Cryptopine \Cryp"to*pine\ (kr?p"t?-p?n; 104), n. [Gr. krypto`s
   hidden + E. opium.] (Chem.)
   A colorless crystalline alkaloid obtained in small quantities
   from opium.
   [1913 Webster]