i Fe sheclively, ‘at the ° ‘same ‘temperature as the Pave: of 
ee ine pons were not altered’ when Tne the. synthetic and. th 
Tic. oe CH Chae Sone : | a i . HOC | es I hs 
@) ee : re (Il) Veratric acid. 
CC Ost CH, Ae soe i a 
e hy e * aC yt MHD nantes acid: Hoe APRs Seah 
eae oe ne, a: H,COC: CH: ee Si. 
oh ‘Vanillalacetone. oe os 
product of gingerol, the real: splingbak principle of ginger. . ite ‘i 
Lapworth and his collaborators isolated gingerol, the mother-substance of 7 zinger 1c, 
from the alcoholic extract of African ginger by repeated treatment with | alcohol 
‘different strength, milk of lime, chloroform, and petroleum. In the pure state, ‘gi 
is a liquid boiling even in a cathode-ray vacuum with slight. decomposition. -Its empi 
formula is probably CizHy6O. or CisH2sOx. To judge from its behaviour towards all 
the presence ofa phenolic hydroxyl group was probable. The alkaline solution fo 
with benzoyl chloride and similar bodies, or with chloroformic esters neutral, ; 
pungent, non-crystallizing compounds. Neither were solid derivatives. obtained b : 
action of bani Semicarbazide, phenylhydrazine, PED or Seat iae 
dd See yields an oxime eudeae whieh showed Piloty’s S test for Keone fa ae 
green coloration when treated with bromine water and hydrogen Baie in ee 
aldehydes (mainly n- -heptylaldehyde), and’ zingerone, is “Focnied ee 
a eres there was formed, by steam pees” n- nevis tae, ide i 
a8 Journ. chemhs Soc. B1. (1877), 533, see, eS is “ ee 
Pe “i = - 
