CONTENTS 



Xlll 



Salicin ..... 



Monotropitin 



Aucubin .... 



Orobanchin .... 



Asperulin .... 



Gein ..... 



Melilotosin .... 



Indican .... 



Identification . 

 Cyanogenetic glucosides 



Reactions .... 



Amygdalin .... 



Prunasin, prulaurasin, and sambunigrin 



Dhurrin .... 



Phaseolunatin or linamarin 



Lotusin .... 



Saponins ..... 



Physical and Chemical Properties 



Isolation .... 



Constitution .... 



Reactions .... 



Physiological action 



General properties and uses 



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SECTION v.— TANNINS . 



Occurrence . 

 Microchemical reactions 

 Physiological significance 

 Phenolic constituents 

 Catechol 



Reactions 

 Resorcinol . 



Reactions 

 Hydroquinone 

 Reactions 

 Protocatechuic acid 



Reactions 

 Pyrogallol or pyrogallic acid 



Reactions 

 Phloroglucinol 

 Reactions 

 Gallic acid . 



Reactions 

 Galloyl-gallic acid or digallic 

 EUagic acid 



Properties and reactions 

 Classification of tannins 

 Properties and description of 

 Pyrogallol tannins . 

 Gallotannic acid 

 Extraction 

 Reactions 



Constitution and synthesis 

 acid 

 EUagitannic acid 

 Tannins as glucosides 

 Catechol tannins 



Cutch or catechu 



Constitution of the catechu tannins 

 Oak-bark tannin or quercitannic acid 

 Phlobaphenes . . . • • 



acid 



individual tannins 



of natural 



gallotannic 



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