Xanthine2,6-Dihydroxypurine2,6-二羟基嘌呤Xanthine黄嘌呤1H-Purine-2,6(3H,7H)-dione3,9-Dihydro-1H-purine-2,6-dione1H-Purine-2,6-diol9H-Purine-2,6(1H,3H)-dioneXanPseudoxanthineXanthin2,6-DioxopurineIsoxanthine1H,3H,7H-Xanthine1H,3H,9H-XanthineNSC 14664Purine-2,6(1H,3H)-dione2,6-Dioxo-1,2,3,6-tetrahydropurineXanthic oxide3,9-Dihydropurine-2,6-dione2,6-dihydroxypurineXANTHINExanthine2,6-dioxo-1,2,3,6-tetrahydropurine9H-purine-2,6-(1H,3H)-dioneXan9H-xanthineXanthinepurine-2(3H),6(1H)-dione7H-xanthine