Fosdenopterin

Chemical Name: (4aR,5aR,11aR,12aS)-8-amino-2,12,12-trihydroxy-4a,5a,6,7,11,11a,12,12a-octahydro-[1,3,2]dioxaphosphinino[4',5':5,6]pyrano[3,2-g]pteridin-10(4H)-one 2-oxide