A  January  191™' }  Digitalis  Glucosides  and  Allied  Drugs.  37 
experimentelle  Pathologie  1875,  p.  16.  —  Berichte  der  deutschen 
chemischen  Gesellschaft  1890,  p.  1555.) 
Digitalinum  passivum  was  the  name  given  by  Nativelle  to  digitin. 
Digitalinum  verum  is  digitalin  Schmiedeberg  of  the  formula 
C35~H56  014.  (Archiv  fiir  Pharmazie  1892,  p.  250,  1895,  p.  299 
and  698,  1899,  p.  455  and  458.  Berichte  der  deutschen  chemis- 
chen Gesellschaft  Berlin  1 898,  p.  2455.) 
Digitaliresin  is  a  body  formed  from  digitalin  Schmiedeberg  by 
hydrolysis.  (Chemisches  Zentralblatt  1875,  p.  262.  Archiv 
fiir  experimentelle  Pathologie,  Vol.  3,  p.  30  and  Vol.  4,  p.  191.) 
Digitaliretin,  C30  H25  O10,  is,  according  to  Kosmann,  an  amorphous 
body  formed  by  the  splitting  up  of  digitalin  Kosmann  under 
the  action  of  sulphuric  acid ;  it  is  only  slightly  soluble  in 
water,  alcohol  and  ether,  but  dissolves  in  hot  alcohol.  (Journal 
der  pharmacie  et  de  chimie  i860,  II,  p.  1. — Rochleder, 
Chemisches  Zentralblatt  1863,  p.  46. — Schmiedeberg,  Archiv 
fiir  experimentelle  Pathologie,  Vol.  3,  p.  26.)  Walz  also 
obtained  a  digitaliretin  by  the  decomposition  of  his  digitaletin 
q.  v.  Neither  the  preparation  of  Kosmann  nor  that  of  Walz 
can  lay  claim  to  uniformity.  (Husemann-Hilger,  Pflan- 
zenstoffe,  2nd  edition  p.  1235.) 
Digitaloin  is  a  compound  of  raw  digitalin  Walz.     (Conf.  p.  29.) 
Digitalon  is  the  lactone  of  digitalonic  acid.  Melting  point 
1 38-1 390  C.  The  name  "  digitalon  "  is  also  given  to  a  special 
preparation — a  solution  of  all  the  glucosides  present  in  digi- 
talis— to  be  used  subcutaneously  in  doses  of  0.5  to  1  c.c. 
(Pharmazeutische  Zeitung  1904,  p.  760,  Therapie  der  Gegen- 
wart  1905,  p.  398.) 
Digitalonic  acid,  CT  H14  Oe,  is  obtained  by  the  oxidation  of  digi- 
talose.  (Berichte  der  deutschen  chemischen  Gesellschaft, 
Berlin  1892,  p.  21 16,  1898,  p.  2454,  1905,'  p.  3621,  1909, 
p.  2610.) 
Digitalose  is  a  sugar  corresponding  to  the  formula  C7  H14  05, 
formed  together  with  digitaligenin  and  grape  sugar  by  the 
hydrolysis  of  digitalin  Kiliani.  (Kiliani,  Archiv  der  Phirmazie 
1892,  p.  250,  1898,  p.  2460.) 
Digitalose  Homolle-Quevenne  is  the  component  of  digitalin  Homolle 
which  is  soluble  in  a  mixture  of  alcohol  and  ether,  and  in- 
soluble in  dilute  alcohol.     (Compare  page  29.) 
Digitalosmin  was  the  name  given  by  Walz  to  the  odoriferous 
