THE CHEMISTRY OF COFFEE 



59 



Formulae 



Empirical Constitutional 



CHisOsN.H.G CH CH CH2 CH< 



I 



CH 



CsH,,N 



CH CH2 CH2 



/ \ / 



NH NH 



Pyrrole Pyrrolidine 



CH2 CH2 



CO CH CH2 



I \ / 



I \/ 



O N(CH3)2 



Stachydrine 

 (a dimethyl betaine of pyrolidine) 



CH- 



CH 



CH 



CH 



CH 



NH 



Pyrrole 

 CH 



/\ 



CH CH 



II I 



CH CH 



\// 



N 

 Pyridine 



CH 

 NCH. 



CH2 



CH2 CH2 



CH2 CHCH2CH2CH. 



NH 



Coniine 



