512 
ON  PANAQUILON. 
The  panaquilon  thus  prepared  is  an  amorphous  yellow  powder, 
which  cannot  be  decolorized  by  animal  charcoal.  It  is  easily 
soluble  in  water  and  alcohol,  but  insoluble  in  ether.  It  has  a 
taste  resembling  glycyrrhizine,  but  bitterish.  By  heat  it  fuses 
and  is  decomposed.  It  burns  without  residue.  Its  solution  is 
not  precipitated  by  acids  or  chlorides  of  mercury  and  platinum, 
but  with  tannin  it  affords  a  precipitate.  By  alkalies  it  is  colored 
brown.  Heated  with  caustic  potash  panaquilon  gives  no 
ammonia. 
Three  analyses  made  with  this  substance,  dried  at  212°  Fahren- 
heit, gave  results  which  in  agreement  with  the  behaviour  of 
panaquilon  below  related,  would  lead  to  the  following  formula 
as  expressing  its  composition  C24  H25  0J8. 
The  behaviour  of  panaquilon  towards  strong  acids  is  very 
characteristic.  It  is  thereby  under  the  separation  of  carbonic 
acid  and  water,  converted  into  a  white  body  insoluble  in  water, 
for  which  I  propose  the  term  panacon.  By  concentrated 
sulphuric,  panaquilon  is  dissolved  with  a  fine  purple  red  color. 
If  this  solution  is  poured  into  water,  a  white  precipitate  results 
of  panacon.  By  an  especial  research  I  convinced  myself  that 
this  change  is  not  accompanied  with  the  formation  of  sugar. 
More  simply,  panacon  is  obtained  when  a  concentrated  solution 
of  panaquilon  is  mixed  with  muriatic  acid,  or,  at  least,  with 
nitric  acid,  and  gently  heated.  Under  a  slight  evolution  of 
carbonic  acid,  panacon  separates  as  a  white  powder,  which  fuses 
by  heat  under  the  liquid. 
Panacon  forms  a  white  powder,  appearing  under  the  microscope 
crystalline.  It  is  tasteless  and  insoluble  in  Water  and  ether,  but 
is  dissolved  by  alcohol.  With  hot  concentrated  nitric  acid  it 
affords  oxalic  acid.  Alkalies  are  without  action  upon  it.  In 
concentrated  sulphuric  acid  it  dissolves  with  a  purple  red  color, 
from  which  it  is  precipitated  white  by  water.  It  is  very  readily 
fusible,  and  burns  with  flame,  and  leaves  no  residue. 
Two  analyses  afforded  results  which  may  be  expressed  by  the 
formula  C22  HJ9  08.  This  formula  is  founded  on  the  assumption 
that  by  the  formation  of  panacon  from  panaquilon,  the  elements 
of  2  atoms  of  carbonic  acid  and  of  o  atoms  of  water  separate 
from  the  latter. — Annals  of  Pharmacy,  from  Annalen  der 
Chemie. 
