title: 7,9-Bis(hy-droxy-meth-yl)-7H-purine-2,6,8(1H,3H,9H)trione.
abstract: The structure of the title uric acid derivative, C(7)H(8)N(4)O(5), from human kidney stones, is characterized by the C and O atoms of one of the two hy-droxy-methyl groups being disordered nearly equally over three different sites. In the crystal, mol-ecules are connected by a three-dimensional hydrogen-bonding scheme though they look stacked in planes nearly parallel to ([Formula: see text]04).
authors.forename: M
authors.initials: M
authors.lastname: Daudon
authors.forename: D
authors.initials: D
authors.lastname: Bazin
authors.forename: K
authors.initials: K
authors.lastname: Adil
authors.forename: A Le
authors.initials: AL
authors.lastname: Bail