Am  Jour.  Pharm 
June,  1878. 
The  Cinchona  Alkaloids. 
sodium  bicarbonate,  in  light  brown  amorphous  flakes,  becoming  black- 
brown  on  drying. 
Paricina,  C16H18N20,  found  with  quinamina  in  red  bark  from  Dar- 
jeeling ;  it  is  at  once  precipitated  by  bicarbonate  of  sodium  from  dilute 
solutions,  and  forms  a  pale  yellow  amorphous  powder,  soluble,  with  a 
yellow  color,  in  ether,  when  fresh,  and  yielding  amorphous  salts  ;  chlo- 
ride of  gold  causes  a  muddy  yellow  coloration,  which  will  not  turn 
purple. 
Paytina}  C21H24N20-fH20,  contained  in  the  white  cinchona  bark 
•of  Payta  ;  it  crystallizes  in  beautiful  prisms,  and  has  the  same  reaction 
with  chloride  of  gold  as  quinamina,  conquinamina  and  quinamidina  ;  it 
differs  from  them,  however,  in  being  easily  precipitated  by  chloride  of 
platinum.     Paytina  rotates  the  plane  of  polarized  light  to  the  left. 
Paytamina  is  the  amorphous  alkaloid  present  with  paytina  in  the 
above  bark  ;  it  is  easily  soluble  in  ether,  is  colored  purple  by  chloride 
of  gold,  and  precipitated  by  chloride  of  platinum. 
Cusconina,  C23H26N2OiH-2H20,  crystallizes  in  small  plates,  was 
discovered  by  Leverkohn  in  Cusco  cinchona,  and  differs  from  all  other 
cinchona  alkaloids  by  forming  an  amorphous,  jelly  like  sulphate  with 
H9S04,  which  is  not  dissolved  by  adding  more  acid.  Its  acetate  and 
other  salts  are  likewise  gelatinous. 
Aricina,  C23H26N204,  is  found  in  the  same  bark  as  cusconina ;  it  was 
discovered  by  Pelletier  and  Coriol,  crystallizes  in  white,  shining  prisms, 
which  melt  at  i88°C,  rotates  the  plane  of  polarization  to  the  left,  like 
cusconia,  and  forms  salts,  which  are  sometimes  gelatinous,  but  are  more 
characterized,  particularly  the  binoxalate  and  acetate,  by  their  sparing 
solubility. 
Cusconidina,  also  a  constituent  of  the  Cusco-bark,  is  precipitated  by 
ammonia  from  solutions  in  acids  in  pale  yellow  amorphous  flakes,  which 
after  being  washed  form  a  loosely  coherent  mass,  become  denser  on 
drying  in  the  air,  and  ultimately  melt  together.  Its  composition  has 
not  yet  been  determined. 
Javanina  was  separated  by  the  author  from  the  so  called  amorphous 
bases  of  Java  calisaya  bark.  It  separates  from  water  slowly  in  rhombic 
scales,  is  very  easily  soluble  in  ether,  without  crystallizing  on  evapora- 
1  In  the  formula  published  in  "  Berichte,"  H20  was  erroneously  given  ;  the  alka- 
loid was  discovered  by  Hesse  in  1870. — Editor. 
