Caffeine soluble in cold water

Adenosine acts
as an inhibitor neurotransmitter that suppresses activity in the central nervous system.

caffeine causes all of except

theobromine is used as a

Useful for asthma

Tannic acid test for

Ferrous sulfate test: (theobromine):
To a solution of the alkaloid + drops of concentrated HCl + few drops of Br2 water + a drop of FeSO4 + few drops of ammonia

Which of the following Alkaloid contain Imidazole ring on its structure ?

Purine, Terpenes and Steroids belong to the category of ?

Tea and Coffee belong to which category of alkaloid ?

Which of the following is CORRECT for Murexide test ?

What is the pKa of Imidazole?

Which heterocycle is most basic?

Nucleophilic substitution reaction for imidazole takes place at.........position.

Imidazole is ......

.Imidazole ring is absent in drug.....

Precursor of imidazole

Name of this structuer

Name of this structuer