Am.  Jour.  Pharm.  \ 
August,  1910.  j 
Ipomcca  Horsfallicc. 
359 
the  phytosterols,  and  it  probably  consisted  of  one  of  the  dihydric 
alcohols,  such  as  ipuranol  and  ipurganol,  which  have  previously 
been  isolated  by  us  from  convolvulaceous  resins  (loc.  cit.)  and  other 
sources.  The  exceedingly  small  amount  of  this  substance  rendered 
it  impossible  to  identify  it. 
The  ethereal  liquid  was  subsequently  shaken  successively  with 
solutions  of  sodium  carbonate  and  sodium  hydroxide,  but  only 
resinous  material  was  thus  removed,  and  on  finally  evaporating  the 
ether  only  a  trace  of  yellow  resin  remained. 
Alcohol  Extract. — This  extract,  which  was  very  small  in  amount, 
resembled  the  two'  preceding  ones,  and  even  after  prolonged  drying 
it  could  not  be  reduced  to  a  powder.  Its  alcoholic  solution  was 
treated  with  baryta,  and  allowed  to  stand  in  a  warm  place  for 
twelve  hours,  after  which  the  alcohol  was  removed,  water  added, 
and  the  barium  precipitated  by  means  of  sulphuric  acid.  The  filtered 
aqueous  liquid  did  not  reduce  Fehling's  solution  until  after  heating 
with  a  drop  of  concentrated  sulphuric  acid,  thus  indicating  that  at 
least  a  portion  of  the  alcoholic  extract  of  the  resin  was  glucosidic. 
Examination  of  the  Aqueous  Liquid. 
The  aqueous  liquid,  as  above  indicated,  represented  that  portion 
of  the  alcoholic  extract  of  the  root  which  was  soluble  in  water,  and 
from  which  the  small  amount  of  resinous  material  had  been  removed. 
It  was  first  shaken  with  ether,  and  on  adding  to  the  ethereal  liquid 
a  little  aqueous  alkali  the  latter  solution  showed  a  blue  fluorescence. 
This  was  probably  due  to  the  presence  of  traces  of  /3-methylassculetin, 
C9Hg(CHo)04,  a  substance  which  we  have  previously  shown  (loc. 
cit.)  to  be  a  constituent  of  jalap  resin. 
After  extracting  the  aqueous  liquid  with  ether,  it  was  treated 
with  a  solution  of  basic  lead  acetate,  which  produced  a  light  brown 
precipitate.  This  was  collected,  washed  with  water,  and  then  sus- 
pended in  water  and  decomposed  by  hydrogen  sulphide.  On  filter- 
ing the  mixture  a  liquid  was  obtained  which  gave  a  slight  brown 
coloration  with  ferric  chloride,  but  it  yielded  nothing  definite.  The 
filtrate  from  the  lead  subacetate  precipitate  was  treated  with  hydro- 
gen sulphide  for  the  removal  of  the  excess  of  lead,  and  again  filtered. 
On  concentrating  this  liquid  a  dark  colored  syrup  was  obtained, 
which  contained  a  quantity  of  sugar,  since  it  readily  yielded 
J-phenylglucosazone,  melting  at  213-2140  C. 
