xanthine

/zan-theen, -thin/US // ˈzæn θin, -θɪn //UK // (ˈzænθiːn, -θaɪn) //

黄嘌呤

Definitions

n.名词 noun

1
Biochemistry, Chemistry.
- : a crystalline, nitrogenous compound, C5H4N4O2, related to uric acid, occurring in urine, blood, and certain animal and vegetable tissues.
- : any derivative of this compound.

One is completely insoluble in water, which we have termed xanthine, a name which Runge has given to a yellow matter from madder.
The yellow deposit which is obtained in this way, is not pure xanthine, as it contains a rather considerable quantity of oil.
This precipitate we treat with cold alcohol, which leaves behind the fatty acids, and dissolves the xanthine.
It comprises the xanthine group and the uric acid group of bodies.
The artificial preparation of theobromine and caffeine from xanthine, and guanine also show clearly their relations.