Cryogenine

Cryogenine is the name for two different unrelated chemical compounds:

Cryogenine is a name for the antipyretic medication phenicarbazide (1-phenylsemicarbazide).^[1]

Cryogenine is also the name for the biphenylquinolizidine lactone alkaloid, also known as vertine or (10α)-4,5-dimethoxy-2-hydroxylythran-12-one, from anticholinergic properties and produces mild euphoria as well as aching of the muscles when taken in pure form in large doses.

The freebase form melts at 250-251 °C and is soluble in moderatly polar organic solvents such as petroleum ether.

In the development of p-nitroaniline spray, vertine produces a purple spot (as does sinicuichine, another biphenylquinolizidine lactone alkaloid found in the Heimias).