CisHs01 
N OH 0-LHO, 
H 
it being remembered that C1eHsOu. has the value of two equiv” 
lents of hydrogen. Farther researches are required to settle this 
question. 
28 W. Gibbs on the Constitution of Organic Compounds. ' 
alanin and not like sarcosin. It appears, however, probable. that — 
there exists another species of leucin having the formula, oa 
But the high equivalent of leucin points out to us the possible — 
existence of three other bodies of a perfectly analogous structure — 
and isomeric with ordinary leucin. Thus we have 
CsHs02 CsH702 CsH302 - 
N {a O+HO, N \e OHO, andN |e" joo 
H H H 7 
Hach one of these five species of leucin must yield a homologue — 
of lactic acid, the only one yet discovered being the leucic acid — 
of Strecker, which belongs to the series of the lactic acid of fer- — 
mented sugar, and is derived from leucin by the action of nitrous — 
CusHs02 . 
C41H30: 
ee 0+HO, 
* Ann. der Chemie und Pharmacie, ci, 314. 
