398 
Küster!) gave a proof for the preexistence of a normal chain 
which seemed to be unchallengable. This author has found that the 
anhydride of the so called threebasie haematie acid possesses the 
formula: 
CH, — C—C— CH, — CH, — COOH 
| | 
CO CO 
SZ 
OÖ 
on account of it being able to produce on exidation suceinie acid 
COOH . CH, . CH, . COOH. The conversion of the anhydride of the 
threebasie haematie acid into the anhydride of the bibasıc acid - 
must therefore be formulated as follows: 
CH, = C=C CH, "CH, -COOH CH = CCC CH 
| | | 
| 
co co = CO CO +00, 
nz De 
Ö Ö 
the more so as the latter substance proved identical, according to 
Mr. Galler?), with the synthetically prepared methyl-ethyl-maleie 
anhydride. 
So far the facts agree exceedingly well with the assumption 
that haemopyrroline is 3-metbyl-4-n-propyl-pyrroline. 
The latest researches of Küster and Haas) seem however 
to call into question the above view. These authors prepared syn- 
thetically, according to the well known method of Michael and 
Tissot, methyl-propyl-maleie anhydride and then the correspon- 
ding imide, and compared it with the oxidation product of haemo- 
pyrroline. Based upon the results obtained by Plancher) one 
must expect that haemopyrroline, being 3-methyl-4-n-propyl-pyrro- 
line will yield on oxidation the imide of methyl-propyl-maleie acid: 
CH, 20=0=CH;.CH,:CH, » CH, -C=0-- CH CH CES 
al Be 
CH CH — CO CO 
N 7 
NH NH 
1) Ber. 35, 2948 (1902). 
2) Ber. 35, 2948 (1902). 
5) Ber. 37, 2470 (1904). 
4) R. Accademia dei Lincei vol. XII, 1° sem., serie 5a, fase. 1°. 10. 
N D ZT ET DE TEL OUR DE RT u 
