Am*octu^Sarm"}     New  Constituents  of  Atropa  Belladonna.  499 
poses  the  methyl  actate  and  simple  and  compound  ammonias,  converts 
the  greater  part  of  the  oils  into  solid  resinous  bodies  of  high  boiling 
points,  and  diminishes  the  percentage  of  acetone,  which,  on  treatment 
with  lime,  gives  condensation-products  of  high  boiling  point.  In 
conclusion,  the  author  refers  to  the  composition  of  the  oils  present  in 
the  crude  naphtha. — /.  Chem.Soc,  1886,  p.  289;  J.  Soc.  Chem.  Ind., 
iv.  319. 
NEW  CONSTITUENTS  OF  ATBOPA  BELLADONNA. 
By  H.  Kunz. 
The  occurrence  of  a  fluorescent  compound  in  belladonna  has  been 
repeatedly  noticed.  The  author  has  found  this  compound  both  in 
the  extract  of  the  root  and  of  the  leaves  and  stalk ;  the  root  extract 
was  acidified  until  all  fluorescence  disappeared,  and  then  agitated  with 
ether.  The  brownish-yellow  residue  left  on  evaporation  of  the 
ethereal  solution  consisted  of  miscroscopic  prisms  having  an  acid  re- 
action. By  washing  with  cold  ether,  a  non-crystallizable,  bitter 
mother- liquor  was  separated,  which  was  reserved  for  further  examin- 
ation. The  crystals  were  purified  by  repeated  treatment  with  boiling 
absolute  alcohol,  which  finally  yielded  small  clusters  of  light  yellow, 
four-sided,  highly  refractive,  rhombic  prisms.  This  substance  the 
author  names  provisionally  chrysatropic  acid,  C12H10O5.  It  melts  at 
201*5°,  resolidifies  at  182'60.  When  carefully  heated,  the  acid  sub- 
limes without  decomposition,  but  when  more  strongly  heated  burns 
with  a  luminous  flame  leaving  no  residue.  It  is  soluble  in  70 — 80 
parts  of  hot  water,  sparingly  in  cold  water  and  in  ether,  more  soluble 
in  alcohol  and  acetic  acid.  The  concentrated  aqueous  and  alcoholic 
solutions  are  pale  yellow  by  transmitted  light,  but  by  reflected  light 
show  a  beautiful  emerald-green  fluorescence ;  dilute  solutions  give  a 
blueish  fluorescence.  The  crystals  dissolve  in  alkalis  or  alkaline  car- 
bonate solutions,  yielding  splendid  blueish-green  fluorescent  solutions. 
An  aqueous  solution  when  treated  with  potassium  permanganate  gives 
a  green  liquid  showing  strong  indigo-blue  fluorescence.  Ferric 
chloride  gives  an  emerald -green  coloration  changing  to  cobalt- blue. 
The  lead  and  copper  salts  were  examined  and  described.  From  the 
formula  and  reactions  of  the  substance,  the  author  infers  a  near 
relationship  to  hydroxynaphthaquinone. 
Leucatropic  acid,  C17H3205,  is  obtained  from  the  bitter  mother-liq- 
