quinonoid

Ester Priel at Ben-Gurion University of the Negev, Kogan has developed new compounds “known as quinonoid cannabinoids“ that parallel in their activity a group of anti-cancer drugs, the best known of which is daunomycin.

The federal medical marijuana crackdown. Ann Althouse 2005

The development of quinonoid compounds that display anticancer activity but are less toxic is a major therapeutic goal.

The federal medical marijuana crackdown. Ann Althouse 2005

But while daunomycin is toxic to the heart, Kogan, with Dr. Ronen Beeri and Dr. Gergana Marincheva of Hadassah University Medical Center in Jerusalem's Ein Kerem, found that the quinonoid cannabinoids are much less cardiotoxic.

The federal medical marijuana crackdown. Ann Althouse 2005

The constitution of the oxyazo compounds has attracted much attention, some chemists holding that they are true azophenols of the type R·N_2·R_1·OH, while others look upon them as having a quinonoid structure, _i. e._ as being quinone hydrazones, type R·NH·N: R_1: O.

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" Various

Hewitt has also attacked the problem by brominating the oxyazobenzenes, and has shown that when the hydrobromic acid produced in the reaction is allowed to remain in the system, a brombenzene-azo-phenol is formed, whilst if it be removed (by the addition of sodium acetate) bromination takes place in the phenolic nucleus; consequently the presence of the mineral acid gives the azo compound a pseudo-quinonoid character, which it does not possess if the mineral acid be removed from the sphere of the reaction.

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" Various