( 463 ) 
Dinitroveratrol prepared by nitration of veratrol ') and of meta- 
hemipinie acid?) and which is consequently formed as follows: 
OCH, OCH, 
NOCH, WS OCH, 
TU wo / 
COOH NG? 
also gives on subsequent nitration the same trinitroveratrol, again 
showing that the constitution of that substance may be expressed 
by C, H(OCH,), (NO,), 1, 2, 3,4, 5. 
Now, trinitroveratrol obtained from veratrol is identical with 
that from the dimethylether of 3.5 dinitropyrocatechin ; the melting 
points of both substances are the same; a mixture of the two sub- 
stances shows no lowering of the melting point, whilst the same 
reaction products are obtained from both substances by the action 
of alcoholic ammonia or methyl-aleoholie sodium methoxide. We 
therefore see that in the nitration of 3.5 dinitroveratrol, the nitro- 
group is introduced between the two existing nitro-groups. 
OCH, OCH, 
HAN OCH, as a 
NON Ao, NO NO: 
NO, 
TipMANN and Marsmoro*) have already demonstrated that trini- 
troveratrol reacts readily with alcoholic ammonia. As they thought 
that the two OCH, groups were replaced by NH,, they have not 
been able to identify the product formed in this reaction. 
On repeating the experiment, I noticed that ammonium nitrite is 
formed so that also one of the NO, groups is replaced by NH,. The 
substance formed melts at 247° and is identical with the compound 
afterwards obtained by Nimrzkr and KurreNBACHer *) which is formed 
by the action of alcoholic ammonia on trinitrohydroquinonedimethy|- 
ether. 
OCH, OCH, OCH, 
7 \OCH, / \NH, JNNO, 
aged = Wesel 5 He 
NO,\/NO, NO,\ NO, NO,\ NO, 
NO, NH, OCH, 
1) BRÜGGEMANN, Journ. f. prakt. Chem. (2). 53, 252. 
*) Rossin, Monatsh. f. Chem. 12, 491. Heiniscu, ibid. 15, 229, 
SPBermo moa ent sin 
4) Ber. 25, 282. 
