522 Nystain(NYS)(制霉菌素) OH OH OH O OHOH OHOH OH HOOC H CHa NH OH OH Deriving from amb, developed by arone and in preclinic phase NYS is recommended for treatment of oral thrush or esophagitis caused by candida albicans in AIDs5.2.2 Nystain (NYS)(制霉菌素) O O O OH H HOOC OH OH OH OH OH OH OH O O CH3 OH NH2 OH Deriving from AMB,developed by Aronex and in preclinic phase. NYS is recommended for treatment of oral thrush or esophagitis caused by Candida albicans in AIDS