Fosdenopterin

Also known as cPMP, precursor Z, precursor Z hydrate, (4aR,5aR,11aR,12aS)-8-amino-2,12,12-trihydroxy-4a,5a,6,9,11,11a,12,12a-octahydro[1,3,2]dioxaphosphinino[4',5':5,6]pyrano[3,2-g]pteridin-10(4H)-one 2-oxide

Fosdenopterin (or cyclic pyranopterin monophosphate, cPMP), sold under the brand name Nulibry, is a medication used to reduce the risk of death due to a rare genetic disease known as molybdenum cofactor deficiency type A.