The molecule is a phosphonic acid consisting of 1-cyclopentyluracil having a phosphomethoxy group at position 2 on the cyclopentyl ring with (1R,2R)-trans-stereochemistry. It derives from a uracil and a phosphonic acid.
[(1R,2R)-2-(2,4-dioxopyrimidin-1-yl)cyclopentyl]oxymethylphosphonic acid