opianine

from The Collaborative International Dictionary of English v.0.48

opianine \o"pi*a*nine\, n. (Chem.)
   An alkaloid ({C22H23NO7}) found in small quantity in opium.
   It is identical with {narcotine}. It is present in amounts up
   to 11% in {Papaver somniferum}, and is used clinically as an
   antitussive. --MI11

   Syn: noscapine; narcosine; opian.
        [1913 Webster +PJC]