The Collaborative International Dictionary of English v.0.48:

Bebeerine \Be*bee"rine\, or Bebirine \Be*bi"rine\
   (b[-e]*b[=e]"r[i^]n or -r[=e]n), n. (Chem.)
   An alkaloid got from the bark of the bebeeru, or green heart
   of Guiana (Nectandra Rodi[oe]i). It is a tonic,
   antiperiodic, and febrifuge, and is used in medicine as a
   substitute for quinine. [Written also bibirine.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buxine \Bux"ine\, n. (Chem.)
   An alkaloid obtained from the Buxus sempervirens, or common
   box tree. It is identical with bebeerine; -- called also
   buxina.
   [1913 Webster]