Séance du mardi 9 Mai 1905. 
PRÉsIDENCE DE M. N. CYBULSKI. 
18. M. M. H. GOLDMANN, J. HETPER et L. MARCHLEWSKI m. t. Studya 
nad barwikiem krwi, IV. (Studies on the blood colouring matter, 
IV preliminary note). (Recherches sur la matière colorante du sang) 
It is well known that Nencki and Zaleski!) and Marchlewski 
and Nencki?) obtained by reduction of haematoporphyrin and phyl- 
loporphyrine respectively a substance of the formula C, H,, N, the 
so called haemopyrroline. According to the first two named authors 
haemopyrroline might be 3-methyl-4-propylpyrroline, a view which 
at first was shared by Küster’) and his coworkers, but lately !) 
called into question by him. Buraczewski and Marchlewski) tried 
to further the problem by synthetieal experiments. They reduced 
the synthetical methyl-propyl-maleinie imide, prepared according 
to Michaels and Tissots6) method and obtained a minute quan- 
tity of a substance that possessed many properties of haemopyrro- 
line; it gave for instance under the action of air a reddish brown 
eolouring matter resembling urobilin, but these experiments were 
so far of purely qualitative nature and could not therefore deeide 
the problem in question definitely. 
For the pyrroline conception of haemopyrroline we have there- 
fore so far only two, not quite binding, proofs: the empyrieal for- 
mula and the fact that haemopyrroline colours firwood red. It oceu- 
red to one of us (L. M.) that a strong support for the pyrroline 
eonception of haemopyrroline might be obtained by studying its 
behaviour towards diazonium compounds. Pyrroline and some of 
its homoloques were investigated in this respect thoroughly by Fi- 
scher and Hepp?). These authors found that pyrroline reacts with 
diazonimucompounds yielding in acid solutions monoazocolouring 
matters, whereas in alkaline solutions in the presence of a suffieient 
1) This Bulletin 1901, 217. 
AT hellen “277. 
3) Ber. 35, 2948 (1902). 
#) , 37, 2470 (1904). 
5) This Bull. 1904, 397. 
S) J. f. pract. Ch. [2] 46, 300, 312. 
7) Ber. 19, 2251. 
1* 
