Xanthopterin is a yellow, crystalline solid that occurs mainly in the wings of butterflies and in the urine of mammals. Small microorganisms convert it into folic acid. It is the end product of a non-conjugated pteridine compound and inhibits the growth of lymphocytes produced by concanavalin. High levels of the chemical were found in patients with liver disease and hemolysis, the latter increasing levels by 35%.

CAS：119-44-8
中文别名：
英文别名：2-aminopteridine-4(3H),6(5H)-dione;4,6-Pteridinedione,2-amino-1,5-dihydro-(9CI);2-amino-3,5-dihydro-pteridine-4,6-dione;2-amino-1,5-dihydropteridine-4,6-quinone;2-amino-1,5-dihydro-4,6-pteridinedione;4,6-Pteridinedione, 2-amino-1,5-dihydro-;2-AMINO-1,5-DIHYDROPTERIDINE-4,6-DIONE;2-Amino-3,5-dihydro-pteridin-4,6-dion;2-Amino-4-oxo-6-hydroxy-3,4-dihydropteridine;2-azanyl-1,5-dihydropteridine-4,6-dione;2-AMINO-4,6-DIHYDROXYPTERIDENE;2-Amino-4,6(1H,5H)-pteridinedione;xanthopterine;
分子式：C6H5N5O2
分子量：179.136
精确质量：179.044
Psa：117.52
Logp：-0.8302

EINECS号：204-325-0
MDL号：MFCD00151242

密度：2.17g/cm3
沸点：686.5ºC at 760mmHg
熔点：410ºC
闪点：369ºC
折射率：1.992

安全说明：26-37/39
危险类别码：R36/37/38
海关编码：2933990090
危险品标志：Xi