92 THE NITROGENOUS DERIVATIVES OF THE ALBUMINS. 



some of which are free from oxygen, while in others this is present. 

 They are all derived from ammonia by the substitution of various 

 radicles for one or all of the nitrogen atoms of ammonia, and are 

 hence analogous to the amins. 



The acyclic ptomains which are free from oxygen comprise the 

 following substances : 



Methylamin .................... NH 2 .CH 3 = CH.N 



Dimethylamin .................. NH(CH S ) 2 = C 2 H 7 N 



Trimethylamin ................... N(CH 3 ) 3 = CgH^N 



Butylamin ..................... NH 2 (C 4 H,,) = C 4 H U N 



Amylamin ..................... NH 2 (C 5 H n ) = C 5 II, N 



Hexylamin .................... NH 2 (C 6 H 13 ) = C b H 15 N 



Neuridin ..................... C 5 H U N 2 



Saprin ............... ....... C 5 H U N 2 



Pentamethylene-diamin or cadaverin ......... NH 2 (CH 2 ) 5 .NH 2 



Ethylene-diamin . . ..... ; .......... NH 2 (C 2 H 4 ) 4 NH 2 



Tetramethylene-diamin or putrescin ......... NH 2 (CH 2 ) 4 .NH 2 



Dimethylene-imide or sperrain ............ (CH 2 ) 2 NH 



Mydalein ..................... 



Methyl-guanidin .................. CH 4 (CH 3 )N 3 



The oxygen-containing acyclic ptomains are the following : 



holin or trimethyl-oxyethylene-am- ) xr/nTT ^ rn TT rvn\ rTT n TT xrr 

 monium hydrate ......../ N(CH 3 ) 3 .(C 2 H 4 .OH).OH == C 5 H I5 NO 2 



N(CH 3 ) 3 .(C 2 H 3 ) .OH - C 5 H 13 NO 



Muscarin . . . . . . . . . . . . . N(CH 3 ) 3 .(CH 2 .COH).OH = C 5 H.=NO 3 



Betain or oxycholin ........ N(CH 3 ) 3 .(CH 2 .COOH).OH = C 5 H,;NO 2 



Mydatoxin ............. C 6 H 13 NO 2 



Mydin .............. C 8 H n NO 



Oadinin .............. C 7 H 16 NO 2 



Methyl-gadinin .......... C 8 H 18 NO 2 



Mytilotoxin ............ C 6 H, 5 NO 2 



Propyl-glucocyamin . ........ C 6 H 13 N 2 O 3 



The remaining ptomains are partly cyclic and in part not classified : 



Collidin (iso-phenyl-ethylamin) .... C 6 H 5 .CH(CH 3 ).NH 2 C 8 H U N 



Hydrocollidin ........... C 8 H I3 N 



Parvolin .............. C 9 H 13 N 



Corindin .............. C 10 H 15 N 



Hydrolutidin ........... C 7 H U N 



Hydrocornidin .......... , C 10 H 17 N 



Scombrin ............. C 17 H 38 N 4 



Morrhuin ............. C 19 H 2T N 3 



Asellin .............. C 25 H 32 N 4 



Morrhuicacid ........... C 5 H 3 (OH)(C 3 H 6 .COOH).NH C 9 H 13 NO 3 



Typhotoxin ............ C 7 H, 7 NO 2 



Tetanin .............. Ci 3 H 30 N 2 O4 



Tetanotoxin ............ C 5 H n N 



Sftasmotoxin ............ 



Tyrotoxin ............. 



Pyocyanin ............. 



Pyoxanthin ............ 



Some of these substances and their origin from the albumins have 

 already been considered, and we shall have further occasion to study 

 them in greater detail. Others are scarcely known, and require no 

 further 'description at this place. They are all intimately related to 



